Add video frame recording capability to Chromoting hosts.

remoting/host/client_session.cc

Index: remoting/host/client_session.cc
diff --git a/remoting/host/client_session.cc b/remoting/host/client_session.cc
index 55e4decc1ca3bb70e29df4836cd787e0f1fbed1c..212fca0a5b13995760b293c0ba1f3bc0fe7552c2 100644
--- a/remoting/host/client_session.cc
+++ b/remoting/host/client_session.cc
@@ -22,6 +22,7 @@
 #include "remoting/host/input_injector.h"
 #include "remoting/host/screen_controls.h"
 #include "remoting/host/screen_resolution.h"
+#include "remoting/host/video_frame_recorder.h"
 #include "remoting/host/video_scheduler.h"
 #include "remoting/proto/control.pb.h"
 #include "remoting/proto/event.pb.h"
@@ -318,6 +319,12 @@ void ClientSession::OnConnectionAuthenticated(
   scoped_ptr<VideoEncoder> video_encoder =
       CreateVideoEncoder(connection_->session()->config());
 
+  // If video recording is enabled, wrap the encoder with the recorder.
+  if (video_frame_recorder_) {
+    video_encoder = video_frame_recorder_->WrapVideoEncoder(
+        video_encoder.Pass());
+  }
+
   // Create a VideoScheduler to pump frames from the capturer to the client.
   video_scheduler_ = new VideoScheduler(
       video_capture_task_runner_,
@@ -469,9 +476,20 @@ void ClientSession::SetDisableInputs(bool disable_inputs) {
 
 void ClientSession::SetGnubbyAuthHandlerForTesting(
     GnubbyAuthHandler* gnubby_auth_handler) {
+  DCHECK(CalledOnValidThread());
   gnubby_auth_handler_.reset(gnubby_auth_handler);
 }
 
+void ClientSession::set_video_frame_recorder(
+    scoped_ptr<VideoFrameRecorder> recorder) {
+  DCHECK(CalledOnValidThread());
+  video_frame_recorder_ = recorder.Pass();
+}
+
+VideoFrameRecorder* ClientSession::video_frame_recorder() const {
+  return video_frame_recorder_.get();
+}
+
 scoped_ptr<protocol::ClipboardStub> ClientSession::CreateClipboardProxy() {
   DCHECK(CalledOnValidThread());