cc: Move tiling management out of draw properties calculation.

cc/layers/picture_layer_impl.h

Index: cc/layers/picture_layer_impl.h
diff --git a/cc/layers/picture_layer_impl.h b/cc/layers/picture_layer_impl.h
index 9609ccf3e449f282ec504f6e35a1001d5a4a93cc..782910cdc6c2ac8fd8555713989cbed547e70d05 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -96,14 +96,6 @@ class CC_EXPORT PictureLayerImpl
   virtual void DidBecomeActive() OVERRIDE;
   virtual void DidBeginTracing() OVERRIDE;
   virtual void ReleaseResources() OVERRIDE;
-  virtual void CalculateContentsScale(float ideal_contents_scale,
-                                      float device_scale_factor,
-                                      float page_scale_factor,
-                                      float maximum_animation_contents_scale,
-                                      bool animating_transform_to_screen,
-                                      float* contents_scale_x,
-                                      float* contents_scale_y,
-                                      gfx::Size* content_bounds) OVERRIDE;
   virtual skia::RefPtr<SkPicture> GetPicture() OVERRIDE;
 
   // PictureLayerTilingClient overrides.
@@ -138,6 +130,8 @@ class CC_EXPORT PictureLayerImpl
   bool IsOnActiveOrPendingTree() const;
   bool AllTilesRequiredForActivationAreReadyToDraw() const;
 
+  float MaximumTilingContentScale() const;
+
  protected:
   friend class LayerRasterTileIterator;
 
@@ -176,6 +170,8 @@ class CC_EXPORT PictureLayerImpl
   bool CanHaveTilingWithScale(float contents_scale) const;
   void SanityCheckTilingState() const;
 
+  virtual void UpdateIdealScales();
+
   virtual void GetDebugBorderProperties(
       SkColor* color, float* width) const OVERRIDE;
   virtual void AsValueInto(base::DictionaryValue* dict) const OVERRIDE;