cc: Move calculation of content rect to RenderSurfaceImpl class

cc/layers/render_surface_impl.h

Index: cc/layers/render_surface_impl.h
diff --git a/cc/layers/render_surface_impl.h b/cc/layers/render_surface_impl.h
index cb7a795b3b1891e4d8e184cd1aa830aa0f46cf44..4b6e3af1768217097f47a9a1321db6a0f8087551 100644
--- a/cc/layers/render_surface_impl.h
+++ b/cc/layers/render_surface_impl.h
@@ -117,7 +117,9 @@ class CC_EXPORT RenderSurfaceImpl {
     contributes_to_drawn_surface_ = contributes_to_drawn_surface;
   }
 
-  void SetContentRect(const gfx::Rect& content_rect);
+  void CalculateContentRectFromAccumulatedContentRect(int max_texture_size);
+  void SetContentRectToViewport();
+  void SetContentRectForTesting(const gfx::Rect& rect);
   gfx::Rect content_rect() const { return draw_properties_.content_rect; }
 
   void ClearAccumulatedContentRect();
@@ -167,6 +169,8 @@ class CC_EXPORT RenderSurfaceImpl {
   int EffectTreeIndex() const;
 
  private:
+  void SetContentRect(const gfx::Rect& content_rect);
+
   LayerImpl* owning_layer_;
 
   // Container for properties that render surfaces need to compute before they