Add video frame recording capability to Chromoting hosts.

remoting/host/chromoting_host.h

Index: remoting/host/chromoting_host.h
diff --git a/remoting/host/chromoting_host.h b/remoting/host/chromoting_host.h
index fe2c26fa60036caa53d33cf83119e3bd868671ee..b4a8a829676ae0e514ed9333d2c0ee2fb5d737cc 100644
--- a/remoting/host/chromoting_host.h
+++ b/remoting/host/chromoting_host.h
@@ -118,6 +118,9 @@ class ChromotingHost : public base::NonThreadSafe,
   // maximum duration.
   void SetMaximumSessionDuration(const base::TimeDelta& max_session_duration);
 
+  // Enables recording of video frame sequences. by clients.

[Sergey Ulanov, 2014/07/11 18:38:03]

remove . after 'sequences'

+  void SetEnableVideoFrameRecording(bool enable);

[Sergey Ulanov, 2014/07/11 18:38:03]

Do we really need this flag? VideoFrameRecorder doesn't use any significant
resources unless recording has been started so I think ClientSession can just
always create it.

+
   ////////////////////////////////////////////////////////////////////////////
   // ClientSession::EventHandler implementation.
   virtual void OnSessionAuthenticating(ClientSession* client) OVERRIDE;
@@ -213,6 +216,9 @@ class ChromotingHost : public base::NonThreadSafe,
   // The maximum duration of any session.
   base::TimeDelta max_session_duration_;
 
+  // True if video frame recording is enabled.
+  bool enable_video_frame_recording_;
+
   // The pairing registry for PIN-less authentication.
   scoped_refptr<protocol::PairingRegistry> pairing_registry_;