add "always allow" option to the mediastream infobar and allow user to allow/not allow acces to devi

chrome/browser/ui/media_stream_infobar_delegate.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_UI_MEDIA_STREAM_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_UI_MEDIA_STREAM_INFOBAR_DELEGATE_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/infobars/infobar_delegate.h"
+#include "chrome/browser/media/media_stream_devices_prefs.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/media_stream_request.h"
 
 class MessageLoop;
+class PrefService;
 class TabContents;
 typedef TabContents TabContentsWrapper;
 
 // This class configures an infobar shown when a page requests access to a
 // user's microphone and/or video camera.  The user is shown a message asking
 // which audio and/or video devices he wishes to use with the current page, and
 // buttons to give access to the selected devices to the page, or to deny access
 // to them.
 class MediaStreamInfoBarDelegate : public InfoBarDelegate {
  public:
   MediaStreamInfoBarDelegate(
       InfoBarTabHelper* tab_helper,
+      Profile* profile,
       const content::MediaStreamRequest* request,
       const content::MediaResponseCallback& callback);
 
   virtual ~MediaStreamInfoBarDelegate();
 
   // These tell whether the user has to select audio and/or video devices.
   bool has_audio() const { return has_audio_; }
   bool has_video() const { return has_video_; }
 
   // Returns lists of audio and/or video devices from which the user will have
   // to choose.
   content::MediaStreamDevices GetAudioDevices() const;
   content::MediaStreamDevices GetVideoDevices() const;
 
   // Returns the security origin (e.g. "www.html5rocks.com") at the origin
   // of this request.
   const GURL& GetSecurityOrigin() const;
 
+  // Returns true if we should show the infobar for this request, otherwise
+  // returns false.
+  bool ShouldShowInfoBar();
+
   // Callbacks to handle accepting devices or denying the request. |audio_id|
   // and |video_id| are the device IDs of the accepted audio and video devices.
+  // |always_allow| is true if the option t
   // The |audio_id| or |video_id| values are ignored if the request did not ask
   // for audio or video devices respectively.
-  void Accept(const std::string& audio_id, const std::string& video_id);
+  void Accept(const std::string& audio_id, const std::string& video_id,
+              bool always_allow);
   void Deny();
 
  private:
+  // Gets an array of selected devices and add them to |devices| array.
+  void GetDevicesWithId(const std::string& audio_id,
+                        const std::string& video_id,
+                        content::MediaStreamDevices* devices);
+
   // Finds a device in the current request with the specified |id| and |type|,
   // and adds it to the |devices| array.
   void AddDeviceWithId(content::MediaStreamDeviceType type,
                        const std::string& id,
                        content::MediaStreamDevices* devices);
 
+  // Gets the always allowed audio and/or video devices. This function is called
+  // by ShouldShowInfoBar().
+  // Returns true if the always allowed devices are available for this
+  // request, otherwise returns false.
+  bool GetAlwaysAllowedDevices(std::string* audio_id, std::string* video_id);
+
   // InfoBarDelegate:
   virtual InfoBar* CreateInfoBar(InfoBarTabHelper* owner) OVERRIDE;
   virtual void InfoBarDismissed() OVERRIDE;
   virtual gfx::Image* GetIcon() const OVERRIDE;
   virtual Type GetInfoBarType() const OVERRIDE;
   virtual MediaStreamInfoBarDelegate* AsMediaStreamInfoBarDelegate() OVERRIDE;
 
   // The original request for access to devices.
   const content::MediaStreamRequest* request_;
 
   // The callback that needs to be Run to notify WebRTC of whether access to
   // audio/video devices was granted or not.
   content::MediaResponseCallback callback_;
 
   // Whether the request is for audio and/or video devices.
   bool has_audio_;
   bool has_video_;
 
+ private:
+  // The media stram capture devices related preferences.
+  MediaStreamDevicesPrefs prefs_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaStreamInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_MEDIA_STREAM_INFOBAR_DELEGATE_H_