Revert "IWYU"

This reverts commit 2aeae78a2c.

Reason for revert: It looks like this is breaking the android roll

out/target/product/angler/obj/SHARED_LIBRARIES/libandroid_runtime_intermediates/android_graphics_Canvas.o frameworks/base/core/jni/android_graphics_Canvas.cpp"
frameworks/base/core/jni/android_graphics_Canvas.cpp:178:15: error: incomplete type 'SkRegion' named in nested name specifier



Original change's description:
> IWYU
> 
> BUG=skia:
> 
> Change-Id: Ib6b4d52841dbe3fa69a86ddb6b97d6a5d0f004ee
> Reviewed-on: https://skia-review.googlesource.com/8231
> Reviewed-by: Florin Malita <fmalita@chromium.org>
> Commit-Queue: Mike Reed <reed@google.com>
> 

TBR=fmalita@chromium.org,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Change-Id: If979c3dd9dc3fe08ac450ced113b3d1e9a86f02a
Reviewed-on: https://skia-review.googlesource.com/8346
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>

gm/drawregion.cpp

@@ -7,7 +7,6 @@
 
 #include "gm.h"
 #include "SkCanvas.h"
-#include "SkRegion.h"
 
 /**
  *  This is very similar to the RectGrid macrobench in Android.

gm/drawregionmodes.cpp

@@ -11,7 +11,6 @@
 #include "SkDashPathEffect.h"
 #include "SkGradientShader.h"
 #include "SkImageFilter.h"
-#include "SkRegion.h"
 
 class DrawRegionModesGM : public skiagm::GM {
 public:

gm/imagealphathreshold.cpp

@@ -8,7 +8,6 @@
 #include "gm.h"
 #include "SkAlphaThresholdFilter.h"
 #include "SkOffsetImageFilter.h"
-#include "SkRegion.h"
 #include "SkSurface.h"
 
 #define WIDTH 500

include/core/SkBitmap.h

@@ -21,6 +21,7 @@ struct SkRect;
 class SkPaint;
 class SkPixelRef;
 class SkPixelRefFactory;
+class SkRegion;
 class SkString;
 
 /** \class SkBitmap

include/core/SkCanvas.h

@@ -8,11 +8,16 @@
 #ifndef SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
+#include "SkTypes.h"
 #include "SkBlendMode.h"
+#include "SkBitmap.h"
 #include "SkClipOp.h"
 #include "SkDeque.h"
+#include "SkImage.h"
 #include "SkPaint.h"
 #include "SkRasterHandleAllocator.h"
+#include "SkRefCnt.h"
+#include "SkRegion.h"
 #include "SkSurfaceProps.h"
 #include "SkLights.h"
 #include "../private/SkShadowParams.h"
@@ -20,21 +25,18 @@
 class GrContext;
 class GrRenderTargetContext;
 class SkBaseDevice;
-class SkBitmap;
 class SkCanvasClipVisitor;
 class SkClipStack;
 class SkData;
 class SkDraw;
 class SkDrawable;
 class SkDrawFilter;
-class SkImage;
 class SkImageFilter;
 class SkMetaData;
 class SkPath;
 class SkPicture;
 class SkPixmap;
 class SkRasterClip;
-class SkRegion;
 class SkRRect;
 struct SkRSXform;
 class SkSurface;

include/private/SkRecords.h

@@ -16,7 +16,6 @@
 #include "SkPath.h"
 #include "SkPicture.h"
 #include "SkRect.h"
-#include "SkRegion.h"
 #include "SkRRect.h"
 #include "SkRSXform.h"
 #include "SkString.h"

samplecode/SampleDitherBitmap.cpp

@@ -10,7 +10,6 @@
 #include "SkColorPriv.h"
 #include "SkGradientShader.h"
 #include "SkPath.h"
-#include "SkRegion.h"
 #include "SkUtils.h"
 #include "SkView.h"
 

src/core/SkLiteDL.cpp

@@ -12,7 +12,6 @@
 #include "SkLiteDL.h"
 #include "SkMath.h"
 #include "SkPicture.h"
-#include "SkRegion.h"
 #include "SkRSXform.h"
 #include "SkTextBlob.h"
 

src/utils/SkCanvasStack.h

@@ -9,7 +9,6 @@
 #define SkCanvasStack_DEFINED
 
 #include "SkNWayCanvas.h"
-#include "SkRegion.h"
 #include "SkTArray.h"
 
 /**

src/utils/SkDumpCanvas.cpp

@@ -10,7 +10,6 @@
 #include "SkPatchUtils.h"
 #include "SkPicture.h"
 #include "SkPixelRef.h"
-#include "SkRegion.h"
 #include "SkRRect.h"
 #include "SkString.h"
 #include "SkTextBlob.h"

tests/PathOpsExtendedTest.cpp

@@ -12,7 +12,6 @@
 #include "SkMatrix.h"
 #include "SkMutex.h"
 #include "SkPaint.h"
-#include "SkRegion.h"
 #include "SkStream.h"
 
 #include <stdlib.h>

tests/SurfaceTest.cpp

@@ -13,7 +13,6 @@
 #include "SkImage_Base.h"
 #include "SkOverdrawCanvas.h"
 #include "SkPath.h"
-#include "SkRegion.h"
 #include "SkRRect.h"
 #include "SkSurface.h"
 #include "SkUtils.h"

tools/debugger/SkDrawCommand.h

@@ -11,7 +11,6 @@
 #include "SkCanvas.h"
 #include "SkTLazy.h"
 #include "SkPath.h"
-#include "SkRegion.h"
 #include "SkRRect.h"
 #include "SkRSXform.h"
 #include "SkString.h"