Add a feature to display a persistence toggle for permission prompts on Android.

chrome/browser/geolocation/geolocation_infobar_delegate_android.h

 // Copyright 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_GEOLOCATION_GEOLOCATION_INFOBAR_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_GEOLOCATION_GEOLOCATION_INFOBAR_DELEGATE_ANDROID_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "chrome/browser/permissions/permission_infobar_delegate.h"
 
+class InfoBarService;

[Lei Zhang, 2016/08/16 04:25:48]

BTW, the Google C++ Style Guide changed at some point w.r.t. to forward
declarations.
https://google.github.io/styleguide/cppguide.html#Forward_Declarations

I don't make the decisions, just the messenger.

+
 // GeolocationInfoBarDelegateAndroids are created by the
 // PermissionQueueController to control the display
 // and handling of geolocation permission infobars to the user.
 class GeolocationInfoBarDelegateAndroid : public PermissionInfobarDelegate {
  public:
   // Creates a geolocation infobar and delegate and adds the infobar to
   // |infobar_service|.  Returns the infobar if it was successfully added.
   static infobars::InfoBar* Create(InfoBarService* infobar_service,
                                    const GURL& requesting_frame,
                                    bool user_gesture,
@@ skipping 11 matching lines @@
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   int GetIconId() const override;
   int GetMessageResourceId() const override;
 
   GURL requesting_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(GeolocationInfoBarDelegateAndroid);
 };
 
 #endif  // CHROME_BROWSER_GEOLOCATION_GEOLOCATION_INFOBAR_DELEGATE_ANDROID_H_