Revert of Pass Surface ID namespace to renderer compositors.

content/browser/renderer_host/render_widget_host_view_base.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/renderer_host/render_widget_host_view_base.h"
 
 #include "base/logging.h"
 #include "base/profiler/scoped_tracker.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
@@ skipping 681 matching lines @@
   }
 
   return primary_landscape_angle == angle
       ? blink::WebScreenOrientationLandscapePrimary
       : blink::WebScreenOrientationLandscapeSecondary;
 }
 
 void RenderWidgetHostViewBase::OnDidNavigateMainFrameToNewPage() {
 }
 
-uint32_t RenderWidgetHostViewBase::GetSurfaceIdNamespace() {
-  return 0;
-}
-
 }  // namespace content