Preliminary compositor disabling patch.

cc/layers/delegated_frame_provider.cc

Index: cc/layers/delegated_frame_provider.cc
diff --git a/cc/layers/delegated_frame_provider.cc b/cc/layers/delegated_frame_provider.cc
index bae5e438c0aad34f5c03ef111022cfd704f9a1a5..72159263b2cb94c26e3d2f9ca975cbc9077c7270 100644
--- a/cc/layers/delegated_frame_provider.cc
+++ b/cc/layers/delegated_frame_provider.cc
@@ -73,7 +73,7 @@ void DelegatedFrameProvider::SetFrameData(
 
   for (size_t i = 0; i < observers_.size(); ++i) {
     observers_[i].damage =
-        gfx::UnionRects(observers_[i].damage, root_pass->damage_rect);
+        gfx::UnionRects(observers_[i].damage, root_pass->GetFullDamageRect());
     observers_[i].layer->ProviderHasNewFrame();
   }
 }