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

cc/resources/picture_layer_tiling.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_H_
 #define CC_RESOURCES_PICTURE_LAYER_TILING_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 113 matching lines @@
   };
 
   Region OpaqueRegionInContentRect(const gfx::Rect&) const;
 
   void Reset() { return tiles_.clear(); }
 
   void UpdateTilePriorities(
       WhichTree tree,
       gfx::Size device_viewport,
       const gfx::RectF& viewport_in_layer_space,
+      const gfx::RectF& visible_layer_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 27 matching lines @@
 
   friend class CoverageIterator;
 
  private:
   DISALLOW_ASSIGN(PictureLayerTiling);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_LAYER_TILING_H_