cc: Make tiling interest rect calc based on viewport.

cc/resources/picture_layer_tiling_set.h

Index: cc/resources/picture_layer_tiling_set.h
diff --git a/cc/resources/picture_layer_tiling_set.h b/cc/resources/picture_layer_tiling_set.h
index d04d8d49cc40ce2356239a84f9d84418af2ea4d3..3d81c45a9eb75e2e086f0e9022bb51e7b69f2e42 100644
--- a/cc/resources/picture_layer_tiling_set.h
+++ b/cc/resources/picture_layer_tiling_set.h
@@ -39,7 +39,7 @@ class CC_EXPORT PictureLayerTilingSet {
 
   static scoped_ptr<PictureLayerTilingSet> Create(
       PictureLayerTilingClient* client,
-      size_t max_tiles_for_interest_area,
+      size_t max_interest_area,
       float skewport_target_time_in_seconds,
       int skewport_extrapolation_limit_in_content);
 
@@ -173,7 +173,7 @@ class CC_EXPORT PictureLayerTilingSet {
  private:
   explicit PictureLayerTilingSet(
       PictureLayerTilingClient* client,
-      size_t max_tiles_for_interest_area,
+      size_t max_interest_area,
       float skewport_target_time_in_seconds,
       int skewport_extrapolation_limit_in_content_pixels);
 
@@ -188,7 +188,7 @@ class CC_EXPORT PictureLayerTilingSet {
 
   ScopedPtrVector<PictureLayerTiling> tilings_;
 
-  const size_t max_tiles_for_interest_area_;
+  const size_t max_interest_area_;
   const float skewport_target_time_in_seconds_;
   const int skewport_extrapolation_limit_in_content_pixels_;
   PictureLayerTilingClient* client_;