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

cc/layers/picture_layer_impl.cc

 // 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.
 
 #include "cc/layers/picture_layer_impl.h"
 
 #include <algorithm>
 
 #include "base/time.h"
 #include "cc/base/math_util.h"
@@ skipping 270 matching lines @@
   WhichTree tree =
       layer_tree_impl()->IsActiveTree() ? ACTIVE_TREE : PENDING_TREE;
   bool store_screen_space_quads_on_tiles =
       layer_tree_impl()->debug_state().trace_all_rendered_frames;
   size_t max_tiles_for_interest_area =
       layer_tree_impl()->settings().max_tiles_for_interest_area;
   tilings_->UpdateTilePriorities(
       tree,
       layer_tree_impl()->device_viewport_size(),
       viewport_in_content_space,
+      visible_content_rect(),
       last_bounds_,
       bounds(),
       last_content_scale_,
       contents_scale_x(),
       last_screen_space_transform_,
       current_screen_space_transform,
       current_source_frame_number,
       current_frame_time,
       store_screen_space_quads_on_tiles,
       max_tiles_for_interest_area);
@@ skipping 601 matching lines @@
 scoped_ptr<base::Value> PictureLayerImpl::AsValue() const {
   scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue());
   LayerImpl::AsValueInto(state.get());
 
   state->SetDouble("ideal_contents_scale", ideal_contents_scale_);
   state->Set("tilings", tilings_->AsValue().release());
   return state.PassAs<base::Value>();
 }
 
 }  // namespace cc