cc: Make tiling interest rect calc based on viewport.

cc/resources/picture_layer_tiling.h

Index: cc/resources/picture_layer_tiling.h
diff --git a/cc/resources/picture_layer_tiling.h b/cc/resources/picture_layer_tiling.h
index ad56a2481da6413e4c4ae2e1de8128580a8b89d1..620616d301c58979fdf5431f168b53cd1887603c 100644
--- a/cc/resources/picture_layer_tiling.h
+++ b/cc/resources/picture_layer_tiling.h
@@ -70,7 +70,7 @@ class CC_EXPORT PictureLayerTiling {
       float contents_scale,
       scoped_refptr<RasterSource> raster_source,
       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);
 
@@ -228,7 +228,7 @@ class CC_EXPORT PictureLayerTiling {
   PictureLayerTiling(float contents_scale,
                      scoped_refptr<RasterSource> raster_source,
                      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);
   void SetLiveTilesRect(const gfx::Rect& live_tiles_rect);
@@ -310,7 +310,7 @@ class CC_EXPORT PictureLayerTiling {
   }
   void RemoveTilesInRegion(const Region& layer_region, bool recreate_tiles);
 
-  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_;