Add video frame recording capability to Chromoting hosts.

remoting/host/chromoting_host.cc

Index: remoting/host/chromoting_host.cc
diff --git a/remoting/host/chromoting_host.cc b/remoting/host/chromoting_host.cc
index 6558dbb1c5de20ef3525bce125fb4bf8a2183f6e..299777d6d66e9461935c59ad8b57a758e2855e63 100644
--- a/remoting/host/chromoting_host.cc
+++ b/remoting/host/chromoting_host.cc
@@ -18,6 +18,7 @@
 #include "remoting/host/desktop_environment.h"
 #include "remoting/host/host_config.h"
 #include "remoting/host/input_injector.h"
+#include "remoting/host/video_frame_recorder.h"
 #include "remoting/protocol/connection_to_client.h"
 #include "remoting/protocol/client_stub.h"
 #include "remoting/protocol/host_stub.h"
@@ -84,6 +85,7 @@ ChromotingHost::ChromotingHost(
       authenticating_client_(false),
       reject_authenticating_client_(false),
       enable_curtaining_(false),
+      enable_video_frame_recording_(false),
       weak_factory_(this) {
   DCHECK(network_task_runner_->BelongsToCurrentThread());
   DCHECK(signal_strategy);
@@ -172,6 +174,21 @@ void ChromotingHost::SetMaximumSessionDuration(
   max_session_duration_ = max_session_duration;
 }
 
+void ChromotingHost::SetEnableVideoFrameRecording(bool enable) {
+  DCHECK(network_task_runner_->BelongsToCurrentThread());
+
+  if (enable_video_frame_recording_ == enable)
+    return;
+
+  enable_video_frame_recording_ = enable;
+
+  // Disconnect existing clients if recording is being disabled, in case
+  // one of them is using it.
+  if (!enable) {

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

nit: remove {}

+    DisconnectAllClients();
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////
 // protocol::ClientSession::EventHandler implementation.
 void ChromotingHost::OnSessionAuthenticating(ClientSession* client) {
@@ -331,6 +348,12 @@ void ChromotingHost::OnIncomingSession(
       max_session_duration_,
       pairing_registry_);
 
+  // Set a video frame recorder if recording is enabled.
+  if (enable_video_frame_recording_) {
+    client->set_video_frame_recorder(
+        scoped_ptr<VideoFrameRecorder>(new VideoFrameRecorder()));
+  }
+
   // Registers capabilities provided by host extensions.
   for (HostExtensionList::iterator extension = extensions_.begin();
        extension != extensions_.end(); ++extension) {