cc: GPU rasterize tiles synchronously in PrepareToDraw.

cc/test/layer_tree_test.cc

Index: cc/test/layer_tree_test.cc
diff --git a/cc/test/layer_tree_test.cc b/cc/test/layer_tree_test.cc
index e5a5687d4a01580964408f9ebdd13cbccb815d3a..9e8ee31cc68bcf447a832658f2aa71a6a4c304ed 100644
--- a/cc/test/layer_tree_test.cc
+++ b/cc/test/layer_tree_test.cc
@@ -48,10 +48,11 @@ DrawResult TestHooks::PrepareToDrawOnThread(
 void TestHooks::CreateResourceAndTileTaskWorkerPool(
     LayerTreeHostImpl* host_impl,
     scoped_ptr<TileTaskWorkerPool>* tile_task_worker_pool,
+    scoped_ptr<Rasterizer>* rasterizer,
     scoped_ptr<ResourcePool>* resource_pool,
     scoped_ptr<ResourcePool>* staging_resource_pool) {
   host_impl->LayerTreeHostImpl::CreateResourceAndTileTaskWorkerPool(
-      tile_task_worker_pool, resource_pool, staging_resource_pool);
+      tile_task_worker_pool, rasterizer, resource_pool, staging_resource_pool);
 }
 
 class ExternalBeginFrameSourceForTest
@@ -213,10 +214,12 @@ class LayerTreeHostImplForTesting : public LayerTreeHostImpl {
 
   void CreateResourceAndTileTaskWorkerPool(
       scoped_ptr<TileTaskWorkerPool>* tile_task_worker_pool,
+      scoped_ptr<Rasterizer>* rasterizer,
       scoped_ptr<ResourcePool>* resource_pool,
       scoped_ptr<ResourcePool>* staging_resource_pool) override {
     test_hooks_->CreateResourceAndTileTaskWorkerPool(
-        this, tile_task_worker_pool, resource_pool, staging_resource_pool);
+        this, tile_task_worker_pool, rasterizer, resource_pool,
+        staging_resource_pool);
   }
 
   void WillBeginImplFrame(const BeginFrameArgs& args) override {