Aura: Browser-side changes for Composite-To-Mailbox

content/browser/renderer_host/image_transport_factory.h

Index: content/browser/renderer_host/image_transport_factory.h
diff --git a/content/browser/renderer_host/image_transport_factory.h b/content/browser/renderer_host/image_transport_factory.h
index 96587bd0bd9e9e490660b15825a72fe5e858143b..898d6346c17a8397d53ba0423b9ed45a1c524919 100644
--- a/content/browser/renderer_host/image_transport_factory.h
+++ b/content/browser/renderer_host/image_transport_factory.h
@@ -89,6 +89,9 @@ class ImageTransportFactory {
   // Inserts a SyncPoint into the shared context.
   virtual uint32 InsertSyncPoint() = 0;
 
+  // Blocks waiting for the sync point on the service side.
+  virtual void WaitSyncPoint(uint32 sync_point) = 0;
+
   virtual void AddObserver(ImageTransportFactoryObserver* observer) = 0;
   virtual void RemoveObserver(ImageTransportFactoryObserver* observer) = 0;
 };