Handle failed SendPImageContainerConstructor. (bug 1313770 part 3, r=mattwoodrow)

--HG--
extra : rebase_source : 29089aa04fc2838c649ba92732cecacb62f8505f

gfx/layers/ipc/ImageBridgeChild.cpp

@@ -936,8 +936,10 @@ ImageBridgeChild::CreateImageClientNow(CompositableType aType,
   }
 
   if (aImageContainer) {
-    SendPImageContainerConstructor(aContainerChild);
     aContainerChild->RegisterWithIPDL();
+    if (!SendPImageContainerConstructor(aContainerChild)) {
+      return nullptr;
+    }
   }
 
   RefPtr<ImageClient> client = ImageClient::CreateImageClient(aType, this, TextureFlags::NO_FLAGS);