Deliver IPC messages together with SwapCompositorFrame

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 #include <set>
 #include <utility>
 
@@ skipping 445 matching lines @@
                         OnQueueSyntheticGesture)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderProcessGone, OnRenderProcessGone)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
                         OnUpdateScreenRectsAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
                                 msg_is_ok = OnSwapCompositorFrame(msg))
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DeliverPayload, OnDeliverPayload)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidStopFlinging, OnFlingingStopped)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateIsDelayed, OnUpdateIsDelayed)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTouchEventEmulationEnabled,
                         OnSetTouchEventEmulationEnabled)
     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputTypeChanged,
                         OnTextInputTypeChanged)
@@ skipping 1003 matching lines @@
   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
   UNSHIPPED_TRACE_EVENT0("test_fps",
                          TRACE_DISABLED_BY_DEFAULT("OnSwapCompositorFrame"));
   ViewHostMsg_SwapCompositorFrame::Param param;
   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
     return false;
   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
   uint32 output_surface_id = param.a;
   param.b.AssignTo(frame.get());
 
+  for (int i = 0; i < frame->metadata.payload.size(); ++i) {
+    OnDeliverPayload(frame->metadata.payload[i]);

[mkosiba (inactive), 2014/05/06 22:30:33]

the receiving end on browser side

+  }
+  frame->metadata.payload.clear();
+
   for (size_t i = 0; i < frame->metadata.latency_info.size(); i++)
     AddLatencyInfoComponentIds(&frame->metadata.latency_info[i]);
 
   input_router_->OnViewUpdated(
       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
 
   if (view_) {
     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
     view_->DidReceiveRendererFrame();
   } else {
     cc::CompositorFrameAck ack;
     if (frame->gl_frame_data) {
       ack.gl_frame_data = frame->gl_frame_data.Pass();
       ack.gl_frame_data->sync_point = 0;
     } else if (frame->delegated_frame_data) {
       cc::TransferableResource::ReturnResources(
           frame->delegated_frame_data->resource_list,
           &ack.resources);
     } else if (frame->software_frame_data) {
       ack.last_software_frame_id = frame->software_frame_data->id;
     }
     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
                                process_->GetID(), ack);
   }
   return true;
 }
 
+void RenderWidgetHostImpl::OnDeliverPayload(const IPC::Message& payload) {
+  // Filter any RenderWidgetHostImpl-specific messages here.
+  if (delegate_)
+    delegate_->DispatchMessageWithSwapFrame(payload);
+}
+
 void RenderWidgetHostImpl::OnFlingingStopped() {
   if (view_)
     view_->DidStopFlinging();
 }
 
 void RenderWidgetHostImpl::OnUpdateRect(
     const ViewHostMsg_UpdateRect_Params& params) {
   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
   TimeTicks paint_start = TimeTicks::Now();
 
@@ skipping 816 matching lines @@
   }
 }
 
 SkBitmap::Config RenderWidgetHostImpl::PreferredReadbackFormat() {
   if (view_)
     return view_->PreferredReadbackFormat();
   return SkBitmap::kARGB_8888_Config;
 }
 
 }  // namespace content