Removed "compositor" child window that was created by the GPU process.

content/common/gpu/gpu_messages.h

 // 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 <vector>
 #include <string>
 
 
 #include "base/shared_memory.h"
 #include "content/common/common_param_traits.h"
@@ skipping 143 matching lines @@
 IPC_MESSAGE_CONTROL4(GpuMsg_CreateViewCommandBuffer,
                      gfx::PluginWindowHandle, /* compositing_surface */
                      int32, /* render_view_id */
                      int32, /* renderer_id */
                      GPUCreateCommandBufferConfig /* init_params */)
 
 // Tells the GPU process to create a context for collecting graphics card
 // information.
 IPC_MESSAGE_CONTROL0(GpuMsg_CollectGraphicsInfo)
 
-#if defined(OS_MACOSX)
+#if defined(OS_LINUX) && !defined(TOUCH_UI) || defined(OS_WIN)
+// Tells the GPU process that the browser process has finished resizing the
+// view.
+IPC_MESSAGE_CONTROL2(GpuMsg_ResizeViewACK,
+                     int32 /* renderer_id */,
+                     int32 /* command_buffer_id */)
+#elif defined(OS_MACOSX)
 // Tells the GPU process that the browser process handled the swap
 // buffers request with the given number. Note that it is possible
 // for the browser process to coalesce frames; it is not guaranteed
 // that every GpuHostMsg_AcceleratedSurfaceBuffersSwapped message
 // will result in a buffer swap on the browser side.
 IPC_MESSAGE_CONTROL3(GpuMsg_AcceleratedSurfaceBuffersSwappedACK,
                      int /* renderer_id */,
                      int32 /* route_id */,
                      uint64 /* swap_buffers_count */)
 
@@ skipping 62 matching lines @@
 
 // Message from GPU to add a GPU log message to the about:gpu page.
 IPC_MESSAGE_CONTROL3(GpuHostMsg_OnLogMessage,
                      int /*severity*/,
                      std::string /* header */,
                      std::string /* message */)
 
 // Response from GPU to a GpuMsg_Synchronize message.
 IPC_MESSAGE_CONTROL0(GpuHostMsg_SynchronizeReply)
 
-#if defined(OS_LINUX) && !defined(TOUCH_UI)
+#if defined(OS_LINUX) && !defined(TOUCH_UI) || defined(OS_WIN)
 // Resize the window that is being drawn into. It's important that this
 // resize be synchronized with the swapping of the front and back buffers.
-IPC_SYNC_MESSAGE_CONTROL2_1(GpuHostMsg_ResizeXID,
-                            unsigned long, /* xid */
-                            gfx::Size, /* size */
-                            bool /* success */)
+IPC_MESSAGE_CONTROL4(GpuHostMsg_ResizeView,
+                     int32 /* renderer_id */,
+                     int32 /* render_view_id */,
+                     int32 /* command_buffer_route_id */,
+                     gfx::Size /* size */)
 #elif defined(OS_MACOSX)
 // This message, used on Mac OS X 10.6 and later (where IOSurface is
 // supported), is sent from the GPU process to the browser to indicate that a
 // new backing store was allocated for the given "window" (fake
 // PluginWindowHandle). The renderer ID and render view ID are needed in
 // order to uniquely identify the RenderWidgetHostView on the browser side.
 IPC_MESSAGE_CONTROL1(GpuHostMsg_AcceleratedSurfaceSetIOSurface,
                      GpuHostMsg_AcceleratedSurfaceSetIOSurface_Params)
 
 // This message notifies the browser process that the renderer
@@ skipping 329 matching lines @@
 
 // Confirm decoder has been aborted.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_AbortDone)
 
 // Decoder has faced end of stream marker in the stream.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_EndOfStream)
 
 // Video decoder has encountered an error.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_ErrorNotification,
                     uint32) /* Error ID */