Hookup the window.open flash download interception to the permission prompt

chrome/browser/plugins/flash_download_interception.h

 // Copyright 2016 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_PLUGINS_FLASH_DOWNLOAD_INTERCEPTION_H_
 #define CHROME_BROWSER_PLUGINS_FLASH_DOWNLOAD_INTERCEPTION_H_
 
 #include <memory>
 
 #include "base/macros.h"
 
 namespace content {
 class NavigationHandle;
 class NavigationThrottle;
+class WebContents;
 }
 
 class HostContentSettingsMap;
 class GURL;
 
 // This class creates navigation throttles that intercept navigations to Flash's
 // download page. The user is queried about activating Flash instead, since
 // Chrome already ships with it. Note that this is an UI thread class.
 class FlashDownloadInterception {
  public:
+  static void InterceptFlashDownloadNavigation(content::WebContents* source);
   static bool ShouldStopFlashDownloadAction(
       HostContentSettingsMap* host_content_settings_map,
       const GURL& source_url,
       const GURL& target_url,
       bool has_user_gesture);
 
   static std::unique_ptr<content::NavigationThrottle> MaybeCreateThrottleFor(
       content::NavigationHandle* handle);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlashDownloadInterception);
 };
 
 #endif  // CHROME_BROWSER_PLUGINS_FLASH_DOWNLOAD_INTERCEPTION_H_