Remove using the Shell desktop Window when we don't have an acceleated widget.

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 <windows.h>
 #include <algorithm>
 
 #include "base/bind.h"
@@ skipping 314 matching lines @@
       return;
     }
   }
 
   NOTREACHED();
 }
 
 scoped_refptr<AcceleratedPresenter> AcceleratedPresenterMap::GetPresenter(
     gfx::PluginWindowHandle window) {
   base::AutoLock locked(lock_);
-
-#if defined(USE_AURA)
-  if (!window)
-    return presenters_.begin()->second;
-#endif
-
   PresenterMap::iterator it = presenters_.find(window);
   if (it == presenters_.end())
     return scoped_refptr<AcceleratedPresenter>();
 
   return it->second;
 }
 
 void AcceleratedPresenterMap::ResetPresentThread(
     PresentThread* present_thread) {
   base::AutoLock locked(lock_);
@@ skipping 314 matching lines @@
   if (present_thread_ != present_thread)
     return;
 
   present_thread_->lock()->AssertAcquired();
 
   source_texture_ = NULL;
   swap_chain_ = NULL;
   quantized_size_ = gfx::Size();
 }
 
-#if defined(USE_AURA)
-void AcceleratedPresenter::SetNewTargetWindow(gfx::PluginWindowHandle window) {
-  window_ = window;
-  swap_chain_ = NULL;

[cpu_(ooo_6.6-7.5), 2013/08/25 23:35:17]

the new code does not null the swap chain, is that bad?

[gab, 2013/08/26 19:46:03]

no idea.... scott?

[apatrick_chromium, 2013/08/28 00:03:28]

I think it's okay.

[scottmg, 2013/09/03 16:08:56]

That was probably there to force the Present to create a new swapchain after the
window was changed (sort of behind its back). Since it's just getting the right
window via GetAcceleratedWidget now, should be OK.

-}
-#endif
-
 AcceleratedPresenter::~AcceleratedPresenter() {
 }
 
 bool AcceleratedPresenter::IsSwapChainInitialized() const {
   base::AutoLock locked(*present_thread_->lock());
 
   return !!swap_chain_;
 }
 
 void AcceleratedPresenter::DoPresentAndAcknowledge(
@@ skipping 411 matching lines @@
   presenter_->Suspend();
 }
 
 void AcceleratedSurface::WasHidden() {
   presenter_->WasHidden();
 }
 
 void AcceleratedSurface::SetIsSessionLocked(bool locked) {
   presenter_->SetIsSessionLocked(locked);
 }