Quote WebPreferences in namespace webkit_glue.

content/public/browser/render_view_host.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_
 #pragma once
 
 #include "base/values.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/common/page_zoom.h"
 #include "content/public/common/stop_find_action.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 
 class FilePath;
 class GURL;
 struct WebDropData;
+
+namespace webkit_glue {
 struct WebPreferences;
+}
 
 namespace gfx {
 class Point;
 }
 
 namespace WebKit {
 struct WebFindOptions;
 struct WebMediaPlayerAction;
 struct WebPluginAction;
 }
@@ skipping 209 matching lines @@
   // Changes the zoom level for the current main frame.
   virtual void Zoom(PageZoom zoom) = 0;
 
   // Send the renderer process the current preferences supplied by the
   // RenderViewHostDelegate.
   virtual void SyncRendererPrefs() = 0;
 
   virtual void ToggleSpeechInput() = 0;
 
   // Passes a list of Webkit preferences to the renderer.
-  virtual void UpdateWebkitPreferences(const WebPreferences& prefs) = 0;
+  virtual void UpdateWebkitPreferences(
+      const webkit_glue::WebPreferences& prefs) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_