Use DEF_GPUTEST_FOR_*_CONTEXT macros to obtain the
test GPU context.
Makes changing the context -related classes easier,
since not all tests need to be changed.
BUG=skia:2992
Review URL: https://codereview.chromium.org/1448873002
Restructure SkGpuDevice creation:
*SkSurfaceProps are optional.
*Use SkSurfaceProps to communicate DF text rather than a flag.
*Tell SkGpuDevice::Create whether RT comes from cache or not.
Review URL: https://codereview.chromium.org/848903004
Fixes Android framework build.
When building for the Android framework, we depend on SkUserConfig.h
to define things like SK_SUPPORT_GPU. So we cannot have the first
include inside a guard requring SK_SUPPORT_GPU to be defined. Include
SkTypes first, which will pull in SkUserConfig, define the flag, and
allow us to include GrContextFactory.h.
R=reed@google.com, djsollen@google.com
Author: scroggo@google.com
Review URL: https://codereview.chromium.org/394533003
