Move RequestPpapiBrokerPermission from WebContentsObserver to WebContentsDelegate.

chrome/browser/pepper_broker_observer.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 CHROME_BROWSER_PEPPER_BROKER_OBSERVER_H_
-#define CHROME_BROWSER_PEPPER_BROKER_OBSERVER_H_
-
-#include "content/public/browser/web_contents_observer.h"
-#include "content/public/browser/web_contents_user_data.h"
-
-class PepperBrokerObserver
-    : public content::WebContentsObserver,
-      public content::WebContentsUserData<PepperBrokerObserver> {
- public:
-  virtual ~PepperBrokerObserver();
-
- private:
-  explicit PepperBrokerObserver(content::WebContents* web_contents);
-  friend class content::WebContentsUserData<PepperBrokerObserver>;
-
-  virtual bool RequestPpapiBrokerPermission(
-      content::WebContents* web_contents,
-      const GURL& url,
-      const FilePath& plugin_path,
-      const base::Callback<void(bool)>& callback) OVERRIDE;
-
-  DISALLOW_COPY_AND_ASSIGN(PepperBrokerObserver);
-};
-
-#endif  // CHROME_BROWSER_PEPPER_BROKER_OBSERVER_H_