Revert "Allow MessageFilters to restrict listening to specific message classes"

content/browser/renderer_host/gpu_message_filter.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.
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "content/browser/renderer_host/gpu_message_filter.h"
 
@@ skipping 36 matching lines @@
   }
 
   int route_id;
   int surface_id;
   scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber;
   base::WeakPtrFactory<RenderWidgetHostViewFrameSubscriber> factory;
 };
 
 GpuMessageFilter::GpuMessageFilter(int render_process_id,
                                    RenderWidgetHelper* render_widget_helper)
-    : BrowserMessageFilter(GpuMsgStart),
-      gpu_process_id_(0),
+    : gpu_process_id_(0),
       render_process_id_(render_process_id),
       share_contexts_(false),
       render_widget_helper_(render_widget_helper),
       weak_ptr_factory_(this) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
 #if defined(USE_AURA) || defined(OS_ANDROID)
   // We use the GPU process for UI on Aura, and we need to share renderer GL
   // contexts with the compositor context.
   share_contexts_ = true;
@@ skipping 201 matching lines @@
   // so it is not necessary to end it.
   if (!host || !subscription->surface_id)
     return;
 
   // Note that GpuProcessHost here might not be the same one that frame
   // subscription has applied.
   host->EndFrameSubscription(subscription->surface_id);
 }
 
 }  // namespace content