cc: GPU rasterize tiles synchronously in PrepareToDraw.

cc/resources/tile_task_worker_pool_unittest.cc

Index: cc/resources/tile_task_worker_pool_unittest.cc
diff --git a/cc/resources/tile_task_worker_pool_unittest.cc b/cc/resources/tile_task_worker_pool_unittest.cc
index 02ca225ba86c68b7fb851e6c8c97cfaf6f5be6a6..5145d196fa78839b70e4d4f5de84df7c7b3f6caf 100644
--- a/cc/resources/tile_task_worker_pool_unittest.cc
+++ b/cc/resources/tile_task_worker_pool_unittest.cc
@@ -156,8 +156,8 @@ class TileTaskWorkerPoolTest
       case TILE_TASK_WORKER_POOL_TYPE_GPU:
         Create3dOutputSurfaceAndResourceProvider();
         tile_task_worker_pool_ = GpuTileTaskWorkerPool::Create(
-            base::MessageLoopProxy::current().get(), context_provider_.get(),
-            resource_provider_.get(), false);
+            base::MessageLoopProxy::current().get(),
+            TileTaskWorkerPool::GetTaskGraphRunner());
         break;
       case TILE_TASK_WORKER_POOL_TYPE_BITMAP:
         CreateSoftwareOutputSurfaceAndResourceProvider();