Don't treat http://gpu as a WebUI url

content/browser/webui/content_web_ui_controller_factory.h

 // Copyright (c) 2013 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_BROWSER_WEBUI_CONTENT_WEB_UI_CONTROLLER_FACTORY_H_
 #define CONTENT_BROWSER_WEBUI_CONTENT_WEB_UI_CONTROLLER_FACTORY_H_
 
 #include "base/basictypes.h"
 #include "base/memory/singleton.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_controller_factory.h"
 
 namespace content {
 
-class ContentWebUIControllerFactory : public WebUIControllerFactory {
+class CONTENT_EXPORT ContentWebUIControllerFactory
+    : public WebUIControllerFactory {
  public:
   WebUI::TypeID GetWebUIType(BrowserContext* browser_context,
                              const GURL& url) const override;
   bool UseWebUIForURL(BrowserContext* browser_context,
                       const GURL& url) const override;
   bool UseWebUIBindingsForURL(BrowserContext* browser_context,
                               const GURL& url) const override;
   WebUIController* CreateWebUIControllerForURL(WebUI* web_ui,
                                                const GURL& url) const override;
 
   static ContentWebUIControllerFactory* GetInstance();
 
  protected:
   ContentWebUIControllerFactory();
   ~ContentWebUIControllerFactory() override;
 
  private:
   friend struct DefaultSingletonTraits<ContentWebUIControllerFactory>;
 
   DISALLOW_COPY_AND_ASSIGN(ContentWebUIControllerFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEBUI_CONTENT_WEB_UI_CONTROLLER_FACTORY_H_