Add GPU memory tab to the task manager.

content/browser/gpu/gpu_process_host_ui_shim.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 "content/browser/gpu/gpu_process_host_ui_shim.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 189 matching lines @@
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfacePostSubBuffer,
                         OnAcceleratedSurfacePostSubBuffer)
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceSuspend,
                         OnAcceleratedSurfaceSuspend)
     IPC_MESSAGE_HANDLER(GpuHostMsg_GraphicsInfoCollected,
                         OnGraphicsInfoCollected)
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceNew,
                         OnAcceleratedSurfaceNew)
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceRelease,
                         OnAcceleratedSurfaceRelease)
-
+    IPC_MESSAGE_HANDLER(GpuHostMsg_Vidmem,

[greggman, 2012/08/14 23:48:17]

Sorry to bring this up again but "OnVidmem" has no meaning to me. Looking at
other 7 messages above, every one of them is self explanatory.

OnLogMessage 
OnAcceleratedSurfaceBuffersSwapped
OnAcceleratedSurfacePostSubBuffer
OnAcceleratedSurfaceSuspend
OnGraphicsInfoCollected
OnAcceleratedSurfaceNew
OnAcceleratedSurfaceRelease

But what is OnVidMem?
OnVideoMemoryAllocated? OnVideoMemoryAllocationChanged?

[ccameron, 2012/08/15 02:20:41]

Yes, this was a poor name.  I change the vague "Vidmem" to "VidmemUsageStats"
which is more self-explanatory.

+                        OnVidmem);
 #if defined(TOOLKIT_GTK) || defined(OS_WIN)
     IPC_MESSAGE_HANDLER(GpuHostMsg_ResizeView, OnResizeView)
 #endif
 
     IPC_MESSAGE_UNHANDLED_ERROR()
   IPC_END_MESSAGE_MAP()
 
   return true;
 }
 
@@ skipping 139 matching lines @@
 }
 
 void GpuProcessHostUIShim::OnAcceleratedSurfaceRelease(
     const GpuHostMsg_AcceleratedSurfaceRelease_Params& params) {
   RenderWidgetHostViewPort* view = GetRenderWidgetHostViewFromSurfaceID(
       params.surface_id);
   if (!view)
     return;
   view->AcceleratedSurfaceRelease(params.identifier);
 }
+
+void GpuProcessHostUIShim::OnVidmem(const content::GPUVidmem& vidmem) {
+  GpuDataManagerImpl::GetInstance()->UpdateVidmem(vidmem);
+}
+