in-chrome viewer for metro

ui/surface/accelerated_surface_win.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 "ui/surface/accelerated_surface_win.h"
 
 #include <dwmapi.h>
 #include <windows.h>
 #include <algorithm>
 
@@ skipping 394 matching lines @@
       return;
     }
   }
 
   NOTREACHED();
 }
 
 scoped_refptr<AcceleratedPresenter> AcceleratedPresenterMap::GetPresenter(
     gfx::PluginWindowHandle window) {
   base::AutoLock locked(lock_);
+
+  if (!window) {
+    return presenters_.begin()->second;
+  }
+
   PresenterMap::iterator it = presenters_.find(window);
   if (it == presenters_.end())
     return scoped_refptr<AcceleratedPresenter>();
 
   return it->second;
 }
 
 AcceleratedPresenter::AcceleratedPresenter(gfx::PluginWindowHandle window)
     : present_thread_(g_present_thread_pool.Pointer()->NextThread()),
       window_(window),
@@ skipping 229 matching lines @@
 
 void AcceleratedPresenter::Invalidate() {
   // Make any pending or future presentation tasks do nothing. Once the last
   // last pending task has been ignored, the reference count on the presenter
   // will go to zero and the presenter, and potentially also the present thread
   // it has a reference count on, will be destroyed.
   base::AutoLock locked(lock_);
   window_ = NULL;
 }
 
+void AcceleratedPresenter::SetNewTargetWindow(gfx::PluginWindowHandle window) {
+  window_ = window;
+}
+
 AcceleratedPresenter::~AcceleratedPresenter() {
 }
 
 static base::TimeDelta GetSwapDelay() {
   CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   int delay = 0;
   if (cmd_line->HasSwitch(switches::kGpuSwapDelay)) {
     base::StringToInt(cmd_line->GetSwitchValueNative(
         switches::kGpuSwapDelay).c_str(), &delay);
   }
@@ skipping 262 matching lines @@
   return presenter_->CopyTo(src_subrect, dst_size, buf);
 }
 
 void AcceleratedSurface::Suspend() {
   presenter_->Suspend();
 }
 
 void AcceleratedSurface::WasHidden() {
   presenter_->WasHidden();
 }