cc: Remove the opaque rect return-parameter from ContentLayerClient.

cc/resources/tile_manager_unittest.cc

 // Copyright 2013 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/resources/eviction_tile_priority_queue.h"
 #include "cc/resources/raster_tile_priority_queue.h"
 #include "cc/resources/tile.h"
 #include "cc/resources/tile_priority.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 91 matching lines @@
 
   TileVector CreateTilesWithSize(int count,
                                  TilePriority active_priority,
                                  TilePriority pending_priority,
                                  const gfx::Size& tile_size) {
     TileVector tiles;
     for (int i = 0; i < count; ++i) {
       scoped_refptr<Tile> tile = tile_manager_->CreateTile(picture_pile_.get(),
                                                            tile_size,
                                                            gfx::Rect(),
-                                                           gfx::Rect(),
                                                            1.0,
                                                            0,
                                                            0,
                                                            0);
       tile->SetPriority(ACTIVE_TREE, active_priority);
       tile->SetPriority(PENDING_TREE, pending_priority);
       tiles.push_back(tile);
     }
     return tiles;
   }
@@ skipping 1021 matching lines @@
     all_tiles.insert(queue.Top());
     ++tile_count;
     queue.Pop();
   }
   EXPECT_EQ(tile_count, all_tiles.size());
   EXPECT_EQ(17u, tile_count);
 }
 
 }  // namespace
 }  // namespace cc