Plumb the partial swap though image transport.

content/browser/renderer_host/render_widget_host_view_win.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/renderer_host/render_widget_host_view_win.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 2084 matching lines @@
                  new AcceleratedSurfaceMsg_BuffersSwappedACK(params.route_id));
 
   accelerated_surface_->AsyncPresentAndAcknowledge(
       params.size,
       params.surface_id,
       base::Bind(PostTaskOnIOThread,
                  FROM_HERE,
                  acknowledge_task));
 }
 
+void RenderWidgetHostViewWin::AcceleratedSurfacePostSubBuffer(
+    const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
+    int gpu_host_id) {
+  NOTREACHED();
+}
+
 void RenderWidgetHostViewWin::SetAccessibilityFocus(int acc_obj_id) {
   if (!render_widget_host_)
     return;
 
   render_widget_host_->AccessibilitySetFocus(acc_obj_id);
 }
 
 void RenderWidgetHostViewWin::AccessibilityDoDefaultAction(int acc_obj_id) {
   if (!render_widget_host_)
     return;
@@ skipping 363 matching lines @@
 
   size_t offset = selection_range_.GetMin() - selection_text_offset_;
   memcpy(reinterpret_cast<char*>(reconv) + sizeof(RECONVERTSTRING),
          selection_text_.c_str() + offset, len * sizeof(WCHAR));
 
   // According to Microsft API document, IMR_RECONVERTSTRING and
   // IMR_DOCUMENTFEED should return reconv, but some applications return
   // need_size.
   return reinterpret_cast<LRESULT>(reconv);
 }