If compositor window already exists, then simply return it rather than compla...

chrome/gpu/gpu_command_buffer_stub.cc

 // Copyright (c) 2010 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.
 
 #if defined(ENABLE_GPU)
 
 #include "base/process_util.h"
 #include "base/shared_memory.h"
 #include "build/build_config.h"
 #include "chrome/common/child_thread.h"
@@ skipping 62 matching lines @@
   }
   return 0;
 }
 
 bool GpuCommandBufferStub::CreateCompositorWindow() {
   DCHECK(handle_ != gfx::kNullPluginWindow);
 
   // Ask the browser to create the the host window.
   ChildThread* gpu_thread = ChildThread::current();
   gfx::PluginWindowHandle host_window_id = gfx::kNullPluginWindow;
-  gpu_thread->Send(new GpuHostMsg_CreateCompositorHostWindow(
+  gpu_thread->Send(new GpuHostMsg_GetCompositorHostWindow(
       renderer_id_,
       render_view_id_,
       &host_window_id));
   if (host_window_id == gfx::kNullPluginWindow)
     return false;
   HWND host_window = static_cast<HWND>(host_window_id);
 
   // Create the compositor window itself.
   DCHECK(host_window);
   static ATOM window_class = 0;
@@ skipping 281 matching lines @@
       new GpuHostMsg_ResizeXID(handle_, size, &result));
 #elif defined(OS_WIN)
   HWND hwnd = static_cast<HWND>(compositor_window_);
   UINT swp_flags = SWP_NOSENDCHANGING | SWP_NOOWNERZORDER | SWP_NOCOPYBITS |
     SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_DEFERERASE;
   SetWindowPos(hwnd, NULL, 0, 0, size.width(), size.height(), swp_flags);
 #endif
 }
 
 #endif  // ENABLE_GPU