Update from chromium https://crrev.com/304586

cc/resources/picture_pile_impl.h

Index: cc/resources/picture_pile_impl.h
diff --git a/cc/resources/picture_pile_impl.h b/cc/resources/picture_pile_impl.h
index 6986db40e75d5db49a7c678147ea4ebcc4b2e4ad..b4209e3eaa9740d23877f311ff0824211c38f474 100644
--- a/cc/resources/picture_pile_impl.h
+++ b/cc/resources/picture_pile_impl.h
@@ -17,7 +17,14 @@
 #include "cc/resources/raster_source.h"
 #include "skia/ext/analysis_canvas.h"
 #include "skia/ext/refptr.h"
-#include "third_party/skia/include/core/SkPicture.h"
+
+class SkCanvas;
+class SkPicture;
+class SkPixelRef;
+
+namespace gfx {
+class Rect;
+}
 
 namespace cc {
 
@@ -47,12 +54,13 @@ class CC_EXPORT PicturePileImpl : public RasterSource {
   bool CoversRect(const gfx::Rect& content_rect,
                   float contents_scale) const override;
   void SetShouldAttemptToUseDistanceFieldText() override;
+  void SetBackgoundColor(SkColor background_color) override;
+  void SetRequiresClear(bool requires_clear) override;
   bool ShouldAttemptToUseDistanceFieldText() const override;
   gfx::Size GetSize() const override;
   bool IsSolidColor() const override;
   SkColor GetSolidColor() const override;
   bool HasRecordings() const override;
-  bool IsMask() const override;
 
   // Tracing functionality.
   void DidBeginTracing() override;
@@ -101,13 +109,11 @@ class CC_EXPORT PicturePileImpl : public RasterSource {
   PictureMap picture_map_;
   TilingData tiling_;
   SkColor background_color_;
-  bool contents_opaque_;
-  bool contents_fill_bounds_completely_;
+  bool requires_clear_;
   bool is_solid_color_;
   SkColor solid_color_;
   gfx::Rect recorded_viewport_;
   bool has_any_recordings_;
-  bool is_mask_;
   bool clear_canvas_with_debug_color_;
   float min_contents_scale_;
   int slow_down_raster_scale_factor_for_debug_;