cc: Find a better prioritized rect when the viewport rect is huge.

cc/resources/picture_layer_tiling_set.h

 // Copyright 2012 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_RESOURCES_PICTURE_LAYER_TILING_SET_H_
 #define CC_RESOURCES_PICTURE_LAYER_TILING_SET_H_
 
 #include "cc/base/region.h"
 #include "cc/base/scoped_ptr_vector.h"
 #include "cc/resources/picture_layer_tiling.h"
@@ skipping 37 matching lines @@
   // Remove all tiles; keep all tilings.
   void RemoveAllTiles();
 
   // For all tilings, create any tile that intersects |layer_rect|.
   void CreateTilesFromLayerRect(gfx::Rect layer_rect);
 
   void UpdateTilePriorities(
       WhichTree tree,
       gfx::Size device_viewport,
       gfx::Rect viewport_in_content_space,
+      gfx::Rect visible_content_rect,
       gfx::Size last_layer_bounds,
       gfx::Size current_layer_bounds,
       float last_layer_contents_scale,
       float current_layer_contents_scale,
       const gfx::Transform& last_screen_transform,
       const gfx::Transform& current_screen_transform,
       int current_source_frame_number,
       double current_frame_time,
       bool store_screen_space_quads_on_tiles,
       size_t max_tiles_for_interest_area);
@@ skipping 51 matching lines @@
   gfx::Size layer_bounds_;
   ScopedPtrVector<PictureLayerTiling> tilings_;
 
   friend class Iterator;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerTilingSet);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_LAYER_TILING_SET_H_