Updated latency fixture and refactored connection helper

remoting/test/app_remoting_connection_helper.cc

Index: remoting/test/app_remoting_connection_helper.cc
diff --git a/remoting/test/app_remoting_connection_helper.cc b/remoting/test/app_remoting_connection_helper.cc
index 38b86f72271621b3b6a0169f14bb69a40927cdf2..2dd2f8793cdf59d9a0bc471ef809f380f1e2a7e8 100644
--- a/remoting/test/app_remoting_connection_helper.cc
+++ b/remoting/test/app_remoting_connection_helper.cc
@@ -4,7 +4,6 @@
 
 #include "remoting/test/app_remoting_connection_helper.h"
 
-#include "base/callback_helpers.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/run_loop.h"
@@ -49,11 +48,6 @@ void AppRemotingConnectionHelper::Initialize(
   client_->AddRemoteConnectionObserver(this);
 }
 
-void AppRemotingConnectionHelper::SetHostMessageReceivedCallback(
-      HostMessageReceivedCallback host_message_received_callback) {
-  host_message_received_callback_ = host_message_received_callback;
-}
-
 bool AppRemotingConnectionHelper::StartConnection() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(client_);
@@ -145,11 +139,7 @@ void AppRemotingConnectionHelper::HostMessageReceived(
   VLOG(2) << "HostMessage received by HostMessageReceived()."
           << " type: " << message.type() << " data: " << message.data();
 
-  // If a callback is not registered, then the message is passed to a default
-  // handler for the class based on the message type.
-  if (!host_message_received_callback_.is_null()) {
-    base::ResetAndReturn(&host_message_received_callback_).Run(message);
-  } else if (message.type() == "onWindowAdded") {
+  if (message.type() == "onWindowAdded") {
     HandleOnWindowAddedMessage(message);
   } else {
     VLOG(2) << "HostMessage not handled by HostMessageReceived().";