cc: Clear the invalidation history when moving between compositors.

cc/resources/display_list_recording_source.h

 // Copyright 2014 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_RESOURCES_DISPLAY_LIST_RECORDING_SOURCE_H_
 #define CC_RESOURCES_DISPLAY_LIST_RECORDING_SOURCE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/resources/recording_source.h"
 
 namespace cc {
 class DisplayItemList;
 class DisplayListRasterSource;
 
 class CC_EXPORT DisplayListRecordingSource : public RecordingSource {
  public:
   DisplayListRecordingSource();
   ~DisplayListRecordingSource() override;
 
   // RecordingSource overrides.
   bool UpdateAndExpandInvalidation(ContentLayerClient* painter,
                                    Region* invalidation,
                                    const gfx::Size& layer_size,
                                    const gfx::Rect& visible_layer_rect,
                                    int frame_number,
                                    RecordingMode recording_mode) override;
+  void DidMoveToNewCompositor() override;
   scoped_refptr<RasterSource> CreateRasterSource(
       bool can_use_lcd_text) const override;
   gfx::Size GetSize() const final;
   void SetEmptyBounds() override;
   void SetSlowdownRasterScaleFactor(int factor) override;
   void SetBackgroundColor(SkColor background_color) override;
   void SetRequiresClear(bool requires_clear) override;
   bool IsSuitableForGpuRasterization() const override;
   void SetUnsuitableForGpuRasterizationForTesting() override;
   gfx::Size GetTileGridSizeForTesting() const override;
@@ skipping 18 matching lines @@
   void DetermineIfSolidColor();
 
   bool is_suitable_for_gpu_rasterization_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayListRecordingSource);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_DISPLAY_LIST_RECORDING_SOURCE_H_