gpu: GPU service scheduler.

cc/raster/bitmap_raster_buffer_provider.cc

Index: cc/raster/bitmap_raster_buffer_provider.cc
diff --git a/cc/raster/bitmap_raster_buffer_provider.cc b/cc/raster/bitmap_raster_buffer_provider.cc
index 470e6e033548a6fdd89fc8c546f8ca481ca2535c..b69531a3ea3b3931c43a668c35b095a26c562686 100644
--- a/cc/raster/bitmap_raster_buffer_provider.cc
+++ b/cc/raster/bitmap_raster_buffer_provider.cc
@@ -98,6 +98,8 @@ void BitmapRasterBufferProvider::OrderingBarrier() {
   // No need to sync resources as this provider does not use GL context.
 }
 
+void BitmapRasterBufferProvider::Flush() {}
+
 ResourceFormat BitmapRasterBufferProvider::GetResourceFormat(
     bool must_support_alpha) const {
   return resource_provider_->best_texture_format();