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

Index: chrome/browser/ui/media_stream_infobar_delegate.h
diff --git a/chrome/browser/ui/media_stream_infobar_delegate.h b/chrome/browser/ui/media_stream_infobar_delegate.h
index 586120c2db7f0a8f19df90ff641e0f8acf8cb9d7..1ec403508e33ad97fdc22b9251bed5bcecb2e392 100644
--- a/chrome/browser/ui/media_stream_infobar_delegate.h
+++ b/chrome/browser/ui/media_stream_infobar_delegate.h
@@ -10,10 +10,12 @@
 #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;
 
@@ -26,6 +28,7 @@ class MediaStreamInfoBarDelegate : public InfoBarDelegate {
  public:
   MediaStreamInfoBarDelegate(
       InfoBarTabHelper* tab_helper,
+      Profile* profile,
       const content::MediaStreamRequest* request,
       const content::MediaResponseCallback& callback);
 
@@ -44,20 +47,37 @@ class MediaStreamInfoBarDelegate : public InfoBarDelegate {
   // 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;
@@ -76,6 +96,10 @@ class MediaStreamInfoBarDelegate : public InfoBarDelegate {
   bool has_audio_;
   bool has_video_;
 
+ private:
+  // The media stram capture devices related preferences.
+  MediaStreamDevicesPrefs prefs_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaStreamInfoBarDelegate);
 };