cc: GPU rasterize tiles synchronously in PrepareToDraw

cc/resources/pixel_buffer_raster_worker_pool.cc

Index: cc/resources/pixel_buffer_raster_worker_pool.cc
diff --git a/cc/resources/pixel_buffer_raster_worker_pool.cc b/cc/resources/pixel_buffer_raster_worker_pool.cc
index 175e7d40f220280f111ec20d31fc2df9f9dc339a..24072c46cf460e77d148bc0d8100d5148660b7fe 100644
--- a/cc/resources/pixel_buffer_raster_worker_pool.cc
+++ b/cc/resources/pixel_buffer_raster_worker_pool.cc
@@ -179,6 +179,10 @@ void PixelBufferRasterWorkerPool::Shutdown() {
   DCHECK_EQ(completed_raster_tasks_.size(), raster_task_states_.size());
 }
 
+void PixelBufferRasterWorkerPool::RunTasks(RasterTaskQueue* queue) {
+  NOTIMPLEMENTED();
+}
+
 void PixelBufferRasterWorkerPool::ScheduleTasks(RasterTaskQueue* queue) {
   TRACE_EVENT0("cc", "PixelBufferRasterWorkerPool::ScheduleTasks");