Added ConnectionTimeObserver to calculate the times to authenticate and connect.

remoting/protocol/connection_to_host_impl.cc

Index: remoting/protocol/connection_to_host_impl.cc
diff --git a/remoting/protocol/connection_to_host_impl.cc b/remoting/protocol/connection_to_host_impl.cc
index f4cef0c125c8554833cd9af19595f8ff2681f9a8..b6dac130a47b949ac6cf9c4b7c2682ddb9a3bb7f 100644
--- a/remoting/protocol/connection_to_host_impl.cc
+++ b/remoting/protocol/connection_to_host_impl.cc
@@ -48,6 +48,23 @@ ConnectionToHostImpl::~ConnectionToHostImpl() {
     signal_strategy_->RemoveListener(this);
 }
 
+#define RETURN_STRING_LITERAL(x) \
+case x: \
+return #x;
+
+const char* ConnectionToHost::StateToString(State state) {
+  switch (state) {
+    RETURN_STRING_LITERAL(INITIALIZING);
+    RETURN_STRING_LITERAL(CONNECTING);
+    RETURN_STRING_LITERAL(AUTHENTICATED);
+    RETURN_STRING_LITERAL(CONNECTED);
+    RETURN_STRING_LITERAL(CLOSED);
+    RETURN_STRING_LITERAL(FAILED);
+  }
+  NOTREACHED();
+  return nullptr;
+}
+
 void ConnectionToHostImpl::Connect(
     SignalStrategy* signal_strategy,
     scoped_ptr<TransportFactory> transport_factory,