Send FrameSwapMessageQueue's messages with a separate IPC

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 37d69d717dcc8ed9f7251b35c18430cc7fe8f71d..305fc01a7539d52b5115a5b2cd90cc3051027779 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -804,12 +804,14 @@ IPC_MESSAGE_ROUTED2(ViewHostMsg_UpdateZoomLimits,
                     int /* minimum_percent */,
                     int /* maximum_percent */)
 
-IPC_MESSAGE_ROUTED4(
-    ViewHostMsg_SwapCompositorFrame,
-    uint32_t /* compositor_frame_sink_id */,
-    cc::LocalSurfaceId /* local_surface_id */,
-    cc::CompositorFrame /* frame */,
-    std::vector<IPC::Message> /* messages_to_deliver_with_frame */)
+IPC_MESSAGE_ROUTED3(ViewHostMsg_SwapCompositorFrame,
+                    uint32_t /* compositor_frame_sink_id */,
+                    cc::LocalSurfaceId /* local_surface_id */,
+                    cc::CompositorFrame /* frame */)
+
+IPC_MESSAGE_ROUTED2(ViewHostMsg_FrameSwapMessages,
+                    uint32_t /* frame_token */,
+                    std::vector<IPC::Message> /* messages */)
 
 // Sent if the BeginFrame did not cause a SwapCompositorFrame (e.g. because no
 // updates were required or because it was aborted in the renderer).