cc: GPU rasterize tiles synchronously in PrepareToDraw.

cc/resources/software_rasterizer.cc

+// Copyright 2014 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/software_rasterizer.h"
+
+namespace cc {
+
+scoped_ptr<SoftwareRasterizer> SoftwareRasterizer::Create() {
+  return make_scoped_ptr<SoftwareRasterizer>(new SoftwareRasterizer());
+}
+
+SoftwareRasterizer::SoftwareRasterizer() {
+}
+
+SoftwareRasterizer::~SoftwareRasterizer() {
+}
+
+enum Rasterizer::PrepareTilesMode SoftwareRasterizer::PrepareTilesMode() {
+  return RASTERIZE_PRIORITIZED_TILES;
+}
+
+void SoftwareRasterizer::RasterizeTiles(const TileVector& tiles,
+                                        ResourcePool* resource_pool,
+                                        TileManager* tile_manager) {
+}
+
+}  // namespace cc