WIP GPU scheduler + delayed activation / tile draw

cc/test/fake_raster_buffer_provider.cc

Index: cc/test/fake_raster_buffer_provider.cc
diff --git a/cc/test/fake_raster_buffer_provider.cc b/cc/test/fake_raster_buffer_provider.cc
index 20c91fa6752c9f8dad7a7e9d8f8de1877be08d92..47085d5486fae784dee254faed594409f87b4003 100644
--- a/cc/test/fake_raster_buffer_provider.cc
+++ b/cc/test/fake_raster_buffer_provider.cc
@@ -23,6 +23,18 @@ void FakeRasterBufferProviderImpl::ReleaseBufferForRaster(
 
 void FakeRasterBufferProviderImpl::OrderingBarrier() {}
 
+bool FakeRasterBufferProviderImpl::IsResourceReadyToDraw(
+    const Resource* resource) {
+  return true;
+}
+
+void FakeRasterBufferProviderImpl::SignalResourcesReadyToDraw(
+    const std::vector<const Resource*>& resources,
+    const base::Closure& callback) {
+  if (!callback.is_null())
+    callback.Run();
+}
+
 ResourceFormat FakeRasterBufferProviderImpl::GetResourceFormat(
     bool must_support_alpha) const {
   return ResourceFormat::RGBA_8888;