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

chrome/browser/media/media_stream_devices_prefs.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_MEDIA_MEDIA_STREAM_DEVICES_PREFS_H_
+#define CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_PREFS_H_
+#pragma once
+
+#include <string>
+
+#include "chrome/common/content_settings.h"
+#include "content/public/common/media_stream_request.h"
+
+class ContentSettingsPattern;
+class GURL;
+class PrefService;
+class Profile;
+
+class MediaStreamDevicesPrefs {
+ public:
+  explicit MediaStreamDevicesPrefs(Profile* profile);
+
+  // Registers the preferences related to Media Stream devices whitelist.
+  static void RegisterUserPrefs(PrefService* user_prefs);
+
+  // The following functions are public methods to be called by the media
+  // stream inforbar delegate.
+
+  // Returns true if the media section in content settings is set to
+  // |CONTENT_SETTING_BLOCK|, otherwise returns false.
+  bool IsMediaDeviceBlocked();
+
+  // Returns true if the origin has been always allowed to get access to media
+  // devices by the users, otherwise returns false.
+  bool IsOriginAlwaysAllowed(const GURL& origin);
+
+  // Gets the always allowed audio device for this origin, returns an empty
+  // string if the device is not available.
+  std::string GetAlwaysAllowedAudioDevice(
+      const GURL& origin, const content::MediaStreamDevices& devices);
+
+  // Gets the always allowed video device for this origin, returns an empty
+  // string if the device is not available.
+  std::string GetAlwaysAllowedVideoDevice(
+      const GURL& origin, const content::MediaStreamDevices& devices);
+
+  // Adds the origin and devices to the media device whitelists.
+  // This function is called after the user grants a always allow permission to
+  // the origin.
+  void WhitelistOriginAndDevices(const GURL& origin,
+                               const content::MediaStreamDevices& devices);

[tommi (sloooow) - chröme, 2012/06/11 20:59:21]

fix indent

[no longer working on chromium, 2012/06/14 13:03:25]

Done.

+
+  // Remove the origin and devices from the media device whitelists.
+  // This function does nothing if the origin is not in the whitelists.
+  void RemoveOriginFromWhitelists(const GURL& origin);
+
+ private:
+  // Helper functions.
+  void AddExceptionToContentSettings(const GURL& origin);
+  std::string GetAlwaysAllowedDevice(
+      const char* pref_id,
+      const GURL& origin,
+      const content::MediaStreamDevices& devices);
+  bool IsDevicePairedWithOrigin(const char* pref_id,
+                                const GURL& origin,
+                                const std::string& device);
+  void AddOrigin(const char* pref_id,
+                 const GURL& origin,
+                 const std::string& device);
+  void RemoveOrigin(const char* pref_id, const GURL& security_origin);
+
+  // The profile which owns this object.

[Bernhard Bauer, 2012/06/11 18:16:00]

That's not true. The infobar delegate owns this object.

[no longer working on chromium, 2012/06/14 13:03:25]

Remove this invalid comment.

+  Profile* profile_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaStreamDevicesPrefs);
+};
+
+#endif  // CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_PREFS_H_