cc: Refactor how picture layers are exposed to the tile manager.

cc/test/fake_tile_manager_client.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/test/fake_tile_manager_client.h"
 
+#include <vector>
+
 namespace cc {
 
+FakeTileManagerClient::FakeTileManagerClient() {
+}
+
+FakeTileManagerClient::~FakeTileManagerClient() {
+}
+
+const std::vector<PictureLayerImpl*>&
+FakeTileManagerClient::GetPictureLayers() {
+  return picture_layers_;
+}
+
 }  // namespace cc