Replace setMatrixClip() with BeginPlatformPaint() logic

skia/ext/bitmap_platform_device_skia.cc

Index: skia/ext/bitmap_platform_device_skia.cc
diff --git a/skia/ext/bitmap_platform_device_skia.cc b/skia/ext/bitmap_platform_device_skia.cc
index 7491b934608427ea1008b8d3e5ba031f71ada054..f25a5393b44200af9861a2464a46ad8ac60e6706 100644
--- a/skia/ext/bitmap_platform_device_skia.cc
+++ b/skia/ext/bitmap_platform_device_skia.cc
@@ -49,7 +49,9 @@ SkBaseDevice* BitmapPlatformDevice::onCreateDevice(const CreateInfo& info,
                                       info.fInfo.isOpaque());
 }
 
-PlatformSurface BitmapPlatformDevice::BeginPlatformPaint() {
+PlatformSurface BitmapPlatformDevice::BeginPlatformPaint(const SkMatrix& transform,
+                                                         const SkIRect& clip_bounds) {
+  // TODO(tomhudson): propagate transform and clip
   // TODO(zhenghao): What should we return? The ptr to the address of the
   // pixels? Maybe this won't be called at all.
   return accessBitmap(true).getPixels();