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
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index 0000000000000000000000000000000000000000..717a746c5540f1ac631df89114396848a219228d
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+++ b/content/renderer/message_delivery_policy.h
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+// 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 next swap.
+  MESSAGE_DELIVERY_POLICY_WITH_NEXT_SWAP,
+  // The message will be delivered with the next swap. If two messages of the
+  // same type are queued the first one will be discarded.
+  MESSAGE_DELIVERY_POLICY_WITH_NEXT_SWAP_UNIQUE,
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MESSAGE_DELIVERY_POLICY_H_