Plumb the partial swap though image transport.

content/browser/gpu/gpu_process_host_ui_shim.cc

 // Copyright (c) 2011 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/gpu/gpu_process_host_ui_shim.h"
 
 #include <algorithm>
 
 #include "base/debug/trace_event.h"
 #include "base/id_map.h"
@@ skipping 156 matching lines @@
 bool GpuProcessHostUIShim::OnControlMessageReceived(
     const IPC::Message& message) {
   DCHECK(CalledOnValidThread());
 
   IPC_BEGIN_MESSAGE_MAP(GpuProcessHostUIShim, message)
     IPC_MESSAGE_HANDLER(GpuHostMsg_OnLogMessage,
                         OnLogMessage)
 
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceBuffersSwapped,
                         OnAcceleratedSurfaceBuffersSwapped)
+    IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfacePostSubBuffer,
+                        OnAcceleratedSurfacePostSubBuffer)
 
 #if defined(TOOLKIT_USES_GTK) || defined(OS_WIN)
     IPC_MESSAGE_HANDLER(GpuHostMsg_ResizeView, OnResizeView)
 #endif
 
 #if defined(OS_MACOSX) || defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceNew,
                         OnAcceleratedSurfaceNew)
 #endif
 
@@ skipping 146 matching lines @@
   RenderWidgetHostView* view = host->view();
   if (!view)
     return;
 
   delayed_send.Cancel();
 
   // View must send ACK message after next composite.
   view->AcceleratedSurfaceBuffersSwapped(params, host_id_);
 }
 
+void GpuProcessHostUIShim::OnAcceleratedSurfacePostSubBuffer(
+    const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params) {
+  TRACE_EVENT0("renderer",
+      "GpuProcessHostUIShim::OnAcceleratedSurfacePostSubBuffer");
+
+  ScopedSendOnIOThread delayed_send(
+      host_id_,
+      new AcceleratedSurfaceMsg_PostSubBufferACK(params.route_id));
+
+  RenderViewHost* host = RenderViewHost::FromID(params.renderer_id,
+                                                params.render_view_id);
+  if (!host)
+    return;
+
+  RenderWidgetHostView* view = host->view();
+  if (!view)
+    return;
+
+  delayed_send.Cancel();
+
+  // View must send ACK message after next composite.
+  view->AcceleratedSurfacePostSubBuffer(params, host_id_);
+}
+
 #if defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
 
 void GpuProcessHostUIShim::OnAcceleratedSurfaceRelease(
     const GpuHostMsg_AcceleratedSurfaceRelease_Params& params) {
   RenderViewHost* host = RenderViewHost::FromID(params.renderer_id,
                                                 params.render_view_id);
   if (!host)
     return;
   RenderWidgetHostView* view = host->view();
   if (!view)
     return;
   view->AcceleratedSurfaceRelease(params.identifier);
 }
 
 #endif