Commit Graph

5300 Commits

Author SHA1 Message Date
ethannicholas
5366a09ed0 Revert of added support for PLS path rendering (patchset #16 id:360001 of https://codereview.chromium.org/1541903002/ )
Reason for revert:
ASAN failure at src/gpu/GrXferProcessor.cpp:224

Original issue's description:
> added support for PLS path rendering
>
> BUG=skia:3555
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1541903002
>
> Committed: https://skia.googlesource.com/skia/+/7df3f5e127f8016d17b637cc48a6a4718f1a6822

TBR=bsalomon@google.com,egdaniel@google.com,joshualitt@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:3555
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1626553002

Review URL: https://codereview.chromium.org/1626553002
2016-01-22 09:45:47 -08:00
mtklein
efcc125acd de-proc sk_float_rsqrt
This is the first of many little baby steps to have us stop runtime-detecting NEON.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1616013003
CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot

Review URL: https://codereview.chromium.org/1616013003
2016-01-22 08:49:26 -08:00
bsalomon
6c9cd55f00 Make swizzling in read/write pixel copy code more generic
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1617433002

Review URL: https://codereview.chromium.org/1617433002
2016-01-22 07:17:34 -08:00
djsollen
aa97a84404 Revert of Consolidate SK_CRASH and sk_throw into SK_ABORT (patchset #5 id:80001 of https://codereview.chromium.org/1610823002/ )
Reason for revert:
Chrome is calling SK_CRASH

Original issue's description:
> Consolidate SK_CRASH and sk_throw into SK_ABORT
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1610823002
>
> Committed: https://skia.googlesource.com/skia/+/4c5cd7d527ed29aabfa72aa47b23a4496eeda357

TBR=reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1620333002
2016-01-22 06:50:25 -08:00
ethannicholas
7df3f5e127 added support for PLS path rendering
BUG=skia:3555
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1541903002

Review URL: https://codereview.chromium.org/1541903002
2016-01-22 06:48:46 -08:00
djsollen
4c5cd7d527 Consolidate SK_CRASH and sk_throw into SK_ABORT
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1610823002

Review URL: https://codereview.chromium.org/1610823002
2016-01-22 06:04:55 -08:00
reed
6d3cef930a Revert[2] of float color components
This reverts commit 2a2bdc6984.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1622483002

TBR=
NOTRY=True
Test-Ubuntu-GCC-ShuttleA-GPU-GTX660-x86_64-Release-Trybot  seems wicked slow

Review URL: https://codereview.chromium.org/1622483002
2016-01-22 01:04:29 -08:00
reed
2a2bdc6984 Revert of experiment: float color components (patchset #6 id:100001 of https://codereview.chromium.org/1617813002/ )
Reason for revert:
broke some colormatrix tests

Original issue's description:
> experiment: float color components
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1617813002
>
> Committed: https://skia.googlesource.com/skia/+/353c148d8e8c9031daca34c6f9d6bcc6f08706c7

TBR=fmalita@chromium.org,mtklein@google.com,herb@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1623453002
2016-01-22 00:04:30 -08:00
fmalita
7765000709 Hide SkCanvas::{set,get}DrawFilter
Except for Android, which still makes use of it.

BUG=skia:3587
R=reed@google.com,djsollen@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1618843002

Review URL: https://codereview.chromium.org/1618843002
2016-01-21 18:47:11 -08:00
reed
353c148d8e experiment: float color components
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1617813002

Review URL: https://codereview.chromium.org/1617813002
2016-01-21 15:29:10 -08:00
bungeman
f6c7107d03 Expose API for gx font variation axes.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1590223003

Review URL: https://codereview.chromium.org/1590223003
2016-01-21 14:17:47 -08:00
halcanary
27a6e86fb1 SkValue: SkXfermode
Implement:
  template<> SkValue SkToValue<SkXfermode>(const SkXfermode*);

  template<> bool SkFromValue<SkXfermode*>(const SkValue&, SkXfermode**);

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1585813004

NOTRY=true

Review URL: https://codereview.chromium.org/1585813004
2016-01-21 14:15:10 -08:00
caryclark
1a7eb26664 resolution dependent path measure
When a dash is drawn through a canvas with a scaled up
matrix, path measure needs the pixel resolution through
the matrix to construct the dash with sufficient
resolution.

Pass the resolution through to path measure.

Replicate chrome bug in skia GM.

R=reed@google.com
BUG=530095
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1608353002

Review URL: https://codereview.chromium.org/1608353002
2016-01-21 07:07:02 -08:00
joshualitt
01836add2a Revert to old behavior for swap buffers
New behavior is preserved with 'syncOrSwap' call

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1606883005

Review URL: https://codereview.chromium.org/1606883005
2016-01-20 13:09:12 -08:00
joshualitt
4e8f567fa3 add wait on fence without flush
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1610183002

Review URL: https://codereview.chromium.org/1610183002
2016-01-20 10:54:58 -08:00
fs
b1475b0d41 Add SkPath::isLastContourClosed()
Adds a simple method for checking if the last command/verb in the
current contour is a 'close'.

This will simplify determining "closedness" for blink::Path, and aid
in the implementation of algorithms such as:

https://drafts.fxtf.org/motion-1/#motion-processing (second item in list)

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1601103006

Review URL: https://codereview.chromium.org/1601103006
2016-01-20 09:51:08 -08:00
joshualitt
b59d1bc7a8 Add ability to wire up sharelist in glcontext creation
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1604993005

Review URL: https://codereview.chromium.org/1604993005
2016-01-20 08:07:02 -08:00
caryclark
b6474dd1a5 fix circular dashing
Path measure cannot use the same code approach for quadratics
and cubics. Subdividing cubics repeatedly does not result in
subdivided t values, e.g. a quarter circle cubic divided in
half twice does not have a t value equivalent to 1/4.

Instead, always compute the cubic segment from a pair of
t values.

When finding the length of the cubic through recursive measures,
it is enough to carry the point at a given t to the next
subdivision.

(Chrome suppression has landed already.)

R=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1602153002

Review URL: https://codereview.chromium.org/1602153002
2016-01-19 08:07:50 -08:00
kkinnunen
973d92cf91 SampleApp: Remove SkWindow::setColorType
Remove SkWindow::setColorType, it is used wrong and inconsistently.

The color type is actually property of window backbuffer, used when the
window is painted with software. This is as opposed to a generic window
property that would affect all operation.

Similar to MSAA sample count for window GPU backbuffer, the bitmap
backbuffer color type should be a parameter of "attach" or "create
window" functions, should this property ever be added back.

The apps use the call wrong, setting the type as kRGBA_8888
or kBGRRA_8888 without no apparent rationale. These color types
are incorrect, as the raster surface can not work with these.

Reorganize the SkWindow::resize, since no change in SkWindow backbuffer size does not neccessarily mean that SkView would not need the call.

Do not show the sw backbuffer color type in SampleApp title, as
it does not really provide any information. On small screens,
kBGRA_8888_ColorType fills up the whole title.

BUG=skia:4733
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1595503002

Review URL: https://codereview.chromium.org/1595503002
2016-01-18 01:18:35 -08:00
kkinnunen
3ca7336049 SampleApp: remove SkWindow::onPDFSaved, it does not work
Remove SkWindow::onPDFSaved, it does not work and it is not used anymore.

Also, it is very SampleApp -specific feature implemented in SkWindow class.
SkWindow class is probably intended to be more app-agnosting than
what this method implies.

Presumably the idea of the callback was to inform the user of
SampleApp that the PDF was saved to a certain location.

For Android SampleApp, show a hardcoded toast that the PDF was saved to
/sdcard.

BUG=skia:4733
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1547923002

Review URL: https://codereview.chromium.org/1547923002
2016-01-18 00:47:14 -08:00
reed
879caf86fd remove SkDebugUtils.h -- unused
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1585553002

Review URL: https://codereview.chromium.org/1585553002
2016-01-16 12:44:12 -08:00
egdaniel
eed519e6a2 Differentiate maxColorSamples and maxStencilSamples in GrCaps
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1592803002

Review URL: https://codereview.chromium.org/1592803002
2016-01-15 11:36:18 -08:00
joshualitt
11fae87d39 Virtualize Frames in GrAuditTrail
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1581943004

Review URL: https://codereview.chromium.org/1581943004
2016-01-14 10:58:07 -08:00
bsalomon
e5286e0b37 Beginning of support for texture rectangles.
Adds support for importing a RECTANGLE texture into Skia via GrTexureProvider::wrapBackendTexture().

Tests read/writing pixels, copySurface, and clear.

Does not add support for texturing from a RECTANGLE texture as the coords will be incorrectly normalized.

BUG=skia:3868
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1583863002

Review URL: https://codereview.chromium.org/1583863002
2016-01-14 09:24:09 -08:00
robertphillips
1de87df0b7 Refactor to use GrWrapTextureInBitmap more
Too many wrap_texture methods!

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1584933002

Review URL: https://codereview.chromium.org/1584933002
2016-01-14 06:03:29 -08:00
kkinnunen
abc0c8216b SampleApp: Cleanup SkOSWindow_SDL
Implements:
 * Event loop event waiting (no busy loop)
 ** Skia timers
 * Proper window sizing and resizing
 * MSAA on X11 (previously it did not use MSAA at all)
 * Changes requested colorspace from 565 to 8888
   to match non-SDL variants
 * Context creation clearing (color and stencil mask)
 * Opens the window in 640x480 by default on desktop.

Removes dead code.

BUG=skia:4733
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1578173002

Review URL: https://codereview.chromium.org/1578173002
2016-01-14 05:37:51 -08:00
egdaniel
fa8963252e Move some program building utils from GL to GLSL
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1535603006

Review URL: https://codereview.chromium.org/1535603006
2016-01-13 12:19:30 -08:00
reed
fa2b3a376d remove CreateLightingFilter from SkColorFilter
All callers have converted over to SkColorMatrixFilter

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1583923002

Review URL: https://codereview.chromium.org/1583923002
2016-01-13 10:43:09 -08:00
reed
6054d686e6 reorg global initialization, separating core from optional
Chrome will be changed to just inherit our files, with no need to have their own copy. see https://codereview.chromium.org/1581533007/

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1580873002

Review URL: https://codereview.chromium.org/1580873002
2016-01-13 08:47:54 -08:00
joshualitt
f5883a6d75 Hide drawBatch on GrDrawTarget from test Methods
TBR=bsalomon@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1574383002

Review URL: https://codereview.chromium.org/1574383002
2016-01-13 07:47:38 -08:00
joshualitt
bc90735170 GrAuditTrail hooks in GrContext + GrDrawContext
TBR=bsalomon@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1580023002

Review URL: https://codereview.chromium.org/1580023002
2016-01-13 06:45:40 -08:00
ajuma
1554ec0689 Delete SkRectShaderImageFilter
This is no longer used (as of http://crrev.com/368929).

BUG=skia:4780
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1575233004

Review URL: https://codereview.chromium.org/1575233004
2016-01-12 14:17:30 -08:00
joshualitt
87a721b246 Convert GrAuditTrail to use scoped frames
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1579193002

Review URL: https://codereview.chromium.org/1579193002
2016-01-12 12:59:28 -08:00
fmalita
61a237e319 SkPaintFilterCanvas cleanup
All external clients have been updated, we can now remove the
transitional kludges.

BUG=skia:4782
R=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1574303003

Review URL: https://codereview.chromium.org/1574303003
2016-01-12 12:14:10 -08:00
halcanary
2b12376849 SkTime: Stop using POSIX entensions to time.h for timezone
SkTime::GetDateTime() isn't used anywhere in production, so
change it to return current UTC time, rather than local time.

Also, move code into SkTime out of ports.

A later CL will remove empty files.

BUG=skia:4736
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1562943002

[mtklein]
Only deleting unused API.
TBR=reed@google.com

Review URL: https://codereview.chromium.org/1562943002
2016-01-12 11:55:29 -08:00
caryclark
c63a0f8fe5 clamp fixed divide to 32 bits
In SkEdge::setLine, the numerator is a 26.6 fixed number.
SkFixedDiv shifts it up by an additional 16 bits. If the
y interval is small, the result overflows 32 bits.

The code pins in 64 bit space before down-casting the result.

R=reed@google.com
BUG=skia:4708
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1583453002

Review URL: https://codereview.chromium.org/1583453002
2016-01-12 07:21:19 -08:00
fmalita
32cdc32522 SkTCopyOnFirstWrite-based SkPaintFilterCanvas API
I find this version preferable because

1) it consolidates the in/out paint args without compromising
efficiency or flexibility

2) relieves overriders from having to set the SkTLazy explicitly

BUG=skia:4782
R=mtklein@google.com,reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1576183002

Review URL: https://codereview.chromium.org/1576183002
2016-01-12 07:21:11 -08:00
joshualitt
086cee12de Add batch names and bounds to json debug information
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1577093003

Review URL: https://codereview.chromium.org/1577093003
2016-01-12 06:45:24 -08:00
senorblanco
a9fbd1676c Fix SkTileImageFilter when srcRect is a superset of bitmap bounds.
If the input bitmap passed to SkTileImageFilter does not fill the
srcRect, we were tiling this incorrectly (see the first sample
from tileimage filter -- it draws from a srcRect of 12,12 50x50
to a dstRect of 0,0 50x50. There should be no tiling at all
in this case!)

In order to fix this, we need to pad the bitmap out to srcRect,
and tile with that. In order to tile correctly in the GPU case,
we need to request a tileable texture.

NOTE: this will change the results of the tileimagefilter GM (correctness,
and added src / dest rects).

BUG=skia:4774
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1570133003

Review URL: https://codereview.chromium.org/1570133003
2016-01-11 14:09:09 -08:00
fmalita
bad23dc9ed SkPaintFilterCanvas skip-draw support
At the time SkPaintFilterCanvas was introduced as a SkDrawFilter replacement,
no clients were relying on the draw veto logic.  Now Chromium does.

To facilitate migrating off SkDrawFilter, let's augment SkPaintFilterCanvas
with skip-draw semantics.

A side effect of the CL is that now we call the filter virtual even for null
paints.

BUG=skia:4782
R=reed@google.com,robertphillips@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1577933002

Review URL: https://codereview.chromium.org/1577933002
2016-01-11 13:58:30 -08:00
joshualitt
ce894007eb Guard SkGpuDevice
TBR=bsalomon@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1567093002

Review URL: https://codereview.chromium.org/1567093002
2016-01-11 13:29:31 -08:00
reed
c7141eb8fb remove external header for SkModeColorFilter
BUG=skia:4791
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1577073002

Review URL: https://codereview.chromium.org/1577073002
2016-01-11 13:09:00 -08:00
reed
0daf5dd7fc move declaration of CreateLightingFilter into SkColorMatrixFilter
BUG=skia:4791
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1574023002

Review URL: https://codereview.chromium.org/1574023002
2016-01-11 12:34:04 -08:00
bsalomon
9d22fd6e7b Make SkBitmap::CopyTo respect requested dst color type when bitmap is texture backed.
BUG=chromium:550559
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1576983002

Review URL: https://codereview.chromium.org/1576983002
2016-01-11 11:14:17 -08:00
reed
4e23cdaa6b remove imagefilter::sizeconstraint
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1571033002

Review URL: https://codereview.chromium.org/1571033002
2016-01-11 10:56:59 -08:00
joshualitt
5651ee6376 Change to wire up opnames in SkGpuDevice
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1565113004

Review URL: https://codereview.chromium.org/1565113004
2016-01-11 10:39:11 -08:00
joshualitt
4897ff20fc Move atomicinc in GrTracing to behind branch
TBR=bsalomon@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1571603003

Review URL: https://codereview.chromium.org/1571603003
2016-01-11 08:30:48 -08:00
joshualitt
6d0872d9bd Reland of Add guards to GrTextureProvider (patchset #1 id:1 of https://codereview.chromium.org/1565313003/ )
Reason for revert:
should be fixed

Original issue's description:
> Revert of Add guards to GrTextureProvider (patchset #5 id:80001 of https://codereview.chromium.org/1567983002/ )
>
> Reason for revert:
> breaking asan bot
>
> Original issue's description:
> > Add guards to GrTextureProvider
> >
> > TBR=bsalomon@google.com
> > BUG=skia:
> > GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1567983002
> >
> > Committed: https://skia.googlesource.com/skia/+/b30dd1db1d914b85a691b4724713ba1b0f16cd6c
>
> TBR=robertphillips@google.com,joshualitt@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/9a9515e081c54efdd5a0b0
f662c013cbeef6d63f

TBR=bsalomon@google.com
TBR=robertphillips@google.com,joshualitt@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=skia:

Review URL: https://codereview.chromium.org/1575093002
2016-01-11 08:27:48 -08:00
msarett
a4970dc973 Delete reallyHasAlpha() from SkCodec
TBR=reed
BUG=skia:3582
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1557403002

Review URL: https://codereview.chromium.org/1557403002
2016-01-11 07:23:23 -08:00
reed
22471ed134 remove SkImage::applyFilter() -- unused, can always re-add later
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1573653002

Review URL: https://codereview.chromium.org/1573653002
2016-01-08 17:21:47 -08:00