Add basic perf tests for chromoting protocol.

remoting/protocol/connection_to_host.cc

Index: remoting/protocol/connection_to_host.cc
diff --git a/remoting/protocol/connection_to_host.cc b/remoting/protocol/connection_to_host.cc
index 86ab5443ffa1992fd0fee89a0eaba64597275b88..71c7764fd383d7a859385ced6c1e5ce5662e4000 100644
--- a/remoting/protocol/connection_to_host.cc
+++ b/remoting/protocol/connection_to_host.cc
@@ -57,6 +57,16 @@ void ConnectionToHost::Connect(SignalStrategy* signal_strategy,
   DCHECK(clipboard_stub_);
   DCHECK(monitored_video_stub_);
 
+  // Initialize default |candidate_config_| if set_candidate_config() wasn't
+  // called.
+  if (!candidate_config_) {
+    candidate_config_ = CandidateSessionConfig::CreateDefault();
+    if (!audio_stub_) {
+      candidate_config_->DisableAudioChannel();
+    }
+    candidate_config_->EnableVideoCodec(ChannelConfig::CODEC_VP9);
+  }
+
   signal_strategy_ = signal_strategy;
   event_callback_ = event_callback;
   authenticator_ = authenticator.Pass();
@@ -74,6 +84,14 @@ void ConnectionToHost::Connect(SignalStrategy* signal_strategy,
   SetState(CONNECTING, OK);
 }
 
+void ConnectionToHost::set_candidate_config(
+    scoped_ptr<CandidateSessionConfig> config) {
+  DCHECK_EQ(state_, INITIALIZING);
+
+  candidate_config_ = config.Pass();
+}
+
+
 const SessionConfig& ConnectionToHost::config() {
   return session_->config();
 }
@@ -135,15 +153,8 @@ void ConnectionToHost::OnSessionManagerReady() {
   DCHECK(CalledOnValidThread());
 
   // After SessionManager is initialized we can try to connect to the host.
-  scoped_ptr<CandidateSessionConfig> candidate_config =
-      CandidateSessionConfig::CreateDefault();
-  if (!audio_stub_) {
-    candidate_config->DisableAudioChannel();
-  }
-  candidate_config->EnableVideoCodec(ChannelConfig::CODEC_VP9);
-
   session_ = session_manager_->Connect(
-      host_jid_, authenticator_.Pass(), candidate_config.Pass());
+      host_jid_, authenticator_.Pass(), candidate_config_.Pass());
   session_->SetEventHandler(this);
 }