Route IPC through browser when creating a viewable command buffer.

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 @@
       break;
     }
     default:
       return DefWindowProc(hwnd, message, wparam, lparam);
   }
   return 0;
 }
 
 bool GpuCommandBufferStub::CreateCompositorWindow() {
   DCHECK(handle_ != gfx::kNullPluginWindow);
-
-  // Ask the browser to create the the host window.
-  GpuThread* gpu_thread = channel_->gpu_thread();
-  gfx::PluginWindowHandle host_window_id = gfx::kNullPluginWindow;
-  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);
+  HWND host_window = static_cast<HWND>(handle_);
 
   // Create the compositor window itself.
   DCHECK(host_window);
   static ATOM window_class = 0;
   if (!window_class) {
     WNDCLASSEX wcex;
     wcex.cbSize         = sizeof(wcex);
     wcex.style          = 0;
     wcex.lpfnWndProc    = CompositorWindowProc;
     wcex.cbClsExtra     = 0;
@@ skipping 52 matching lines @@
 
 GpuCommandBufferStub::~GpuCommandBufferStub() {
   if (processor_.get()) {
     processor_->Destroy();
   }
 #if defined(OS_WIN)
   if (compositor_window_) {
     DestroyWindow(static_cast<HWND>(compositor_window_));
     compositor_window_ = NULL;
   }
-#elif defined(OS_LINUX)
+#endif  // defined(OS_WIN)
+
   GpuThread* gpu_thread = channel_->gpu_thread();
-  gpu_thread->Send(
-      new GpuHostMsg_ReleaseXID(handle_));
-#endif  // defined(OS_WIN)
+  gpu_thread->Send(new GpuHostMsg_DestroyCommandBuffer(
+      handle_, renderer_id_, render_view_id_));
 }
 
 bool GpuCommandBufferStub::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(GpuCommandBufferStub, message)
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_Initialize, OnInitialize);
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_GetState, OnGetState);
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_AsyncGetState, OnAsyncGetState);
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_Flush, OnFlush);
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_AsyncFlush, OnAsyncFlush);
@@ skipping 203 matching lines @@
 #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  // defined(OS_LINUX)
   }
 }
 
 #endif  // defined(ENABLE_GPU)