Deliver IPC messages together with SwapCompositorFrame

content/renderer/message_delivery_policy.h

Index: content/renderer/message_delivery_policy.h
diff --git a/content/renderer/message_delivery_policy.h b/content/renderer/message_delivery_policy.h
new file mode 100644
index 0000000000000000000000000000000000000000..6a4a6cb6ff634357bcd870dac2b8daca4b14549b
--- /dev/null
+++ b/content/renderer/message_delivery_policy.h
@@ -0,0 +1,26 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_RENDERER_MESSAGE_DELIVERY_POLICY_H_
+#define CONTENT_RENDERER_MESSAGE_DELIVERY_POLICY_H_
+
+namespace content {
+
+enum MessageDeliveryPolicy {
+  // If a commit was requested before the message was enqueued the message
+  // will be delivered with the swap corresponding to that commit. Otherwise
+  // the message will be sent immediately.
+  // If the commit is aborted the message is sent using the regular IPC channel.
+  MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE,
+  // The message will be delivered with the swap corresponding to the next
+  // commit.
+  // If the commit is aborted the message is sent using the regular IPC channel.
+  MESSAGE_DELIVERY_POLICY_WITH_NEXT_COMMIT,
+  // The message will be delivered with the next swap.
+  MESSAGE_DELIVERY_POLICY_WITH_NEXT_SWAP,
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MESSAGE_DELIVERY_POLICY_H_