SetNeedsRedraw directly when updating a visible tile.

cc/test/fake_picture_pile_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TEST_FAKE_PICTURE_PILE_IMPL_H_
 #define CC_TEST_FAKE_PICTURE_PILE_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "cc/resources/picture_pile_impl.h"
 #include "cc/test/fake_content_layer_client.h"
 
+namespace base {
+class WaitableEvent;
+}
+
 namespace cc {
 
 class FakePicturePileImpl : public PicturePileImpl {
  public:
   static scoped_refptr<FakePicturePileImpl> CreateFilledPile(
       const gfx::Size& tile_size,
       const gfx::Size& layer_bounds);
   static scoped_refptr<FakePicturePileImpl> CreateEmptyPile(
       const gfx::Size& tile_size,
       const gfx::Size& layer_bounds);
   static scoped_refptr<FakePicturePileImpl>
       CreateEmptyPileThatThinksItHasRecordings(const gfx::Size& tile_size,
                                                const gfx::Size& layer_bounds);
   static scoped_refptr<FakePicturePileImpl> CreateInfiniteFilledPile();
+  static scoped_refptr<FakePicturePileImpl> CreateFromPile(
+      const PicturePile* other,
+      base::WaitableEvent* blocker);
+
+  // Hi-jack the PlaybackToCanvas method to delay its completion.
+  void PlaybackToCanvas(SkCanvas* canvas,
+                        const gfx::Rect& canvas_rect,
+                        float contents_scale) const override;
 
   TilingData& tiling() { return tiling_; }
 
   void AddRecordingAt(int x, int y);
   void RemoveRecordingAt(int x, int y);
   void RerecordPile();
 
   void add_draw_rect(const gfx::RectF& rect) {
     client_.add_draw_rect(rect, default_paint_);
   }
@@ skipping 41 matching lines @@
 
   int num_tiles_x() const { return tiling_.num_tiles_x(); }
   int num_tiles_y() const { return tiling_.num_tiles_y(); }
 
   void SetMinContentsScale(float scale);
   void SetBufferPixels(int new_buffer_pixels);
   void Clear();
 
  protected:
   FakePicturePileImpl();
-  explicit FakePicturePileImpl(const PicturePile* other);
+  FakePicturePileImpl(const PicturePile* other, base::WaitableEvent* blocker);
   ~FakePicturePileImpl() override;
 
   FakeContentLayerClient client_;
   SkPaint default_paint_;
+  base::WaitableEvent* raster_thread_blocker_;
   SkTileGridFactory::TileGridInfo tile_grid_info_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PICTURE_PILE_IMPL_H_