Force use of and cache render surface.

cc/layers/render_surface_impl.h

 // Copyright 2011 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_LAYERS_RENDER_SURFACE_IMPL_H_
 #define CC_LAYERS_RENDER_SURFACE_IMPL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 136 matching lines @@
   LayerImpl* MaskLayer();
   bool HasMask() const;
 
   const FilterOperations& Filters() const;
   const FilterOperations& BackgroundFilters() const;
   gfx::PointF FiltersOrigin() const;
   gfx::Transform SurfaceScale() const;
 
   bool HasCopyRequest() const;
 
+  bool ShouldCacheRenderSurface() const;
+
   void ResetPropertyChangedFlags();
   bool SurfacePropertyChanged() const;
   bool SurfacePropertyChangedOnlyFromDescendant() const;
   bool AncestorPropertyChanged() const;
   void NoteAncestorPropertyChanged();
+  bool HasDamageFromeContributingContent() const;
 
   DamageTracker* damage_tracker() const { return damage_tracker_.get(); }
   gfx::Rect GetDamageRect() const;
 
   std::unique_ptr<RenderPass> CreateRenderPass();
   void AppendQuads(DrawMode draw_mode,
                    RenderPass* render_pass,
                    AppendQuadsData* append_quads_data);
 
   int TransformTreeIndex() const;
@@ skipping 60 matching lines @@
   // surface, and that ignores outside occlusion. This can point to itself.
   const RenderSurfaceImpl* nearest_occlusion_immune_ancestor_;
 
   std::unique_ptr<DamageTracker> damage_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderSurfaceImpl);
 };
 
 }  // namespace cc
 #endif  // CC_LAYERS_RENDER_SURFACE_IMPL_H_