Add UMA histograms for more detailed latency tracking on the CRD host.

remoting/protocol/host_event_dispatcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/protocol/host_event_dispatcher.h"
 
 #include "base/callback_helpers.h"
 #include "net/socket/stream_socket.h"
 #include "remoting/base/constants.h"
 #include "remoting/proto/event.pb.h"
 #include "remoting/proto/internal.pb.h"
 #include "remoting/protocol/input_stub.h"
 
 namespace remoting {
 namespace protocol {
 
 HostEventDispatcher::HostEventDispatcher()
     : ChannelDispatcherBase(kEventChannelName),
       input_stub_(nullptr),
       parser_(base::Bind(&HostEventDispatcher::OnMessageReceived,
                          base::Unretained(this)),
-              reader()) {
-}
+              reader()) {}
 
-HostEventDispatcher::~HostEventDispatcher() {
-}
+HostEventDispatcher::~HostEventDispatcher() {}
 
 void HostEventDispatcher::OnMessageReceived(scoped_ptr<EventMessage> message,
                                             const base::Closure& done_task) {
   DCHECK(input_stub_);
 
   base::ScopedClosureRunner done_runner(done_task);
 
-  if (message->has_timestamp() && !event_timestamp_callback_.is_null())
-    event_timestamp_callback_.Run(message->timestamp());
+  if (!on_input_event_callback_.is_null())
+    on_input_event_callback_.Run(message->timestamp());
 
   if (message->has_key_event()) {
     const KeyEvent& event = message->key_event();
     if (event.has_usb_keycode() && event.has_pressed()) {
       input_stub_->InjectKeyEvent(event);
     } else {
       LOG(WARNING) << "Received invalid key event.";
     }
   } else if (message->has_text_event()) {
     const TextEvent& event = message->text_event();
     if (event.has_text()) {
       input_stub_->InjectTextEvent(event);
     } else {
       LOG(WARNING) << "Received invalid text event.";
     }
   } else if (message->has_mouse_event()) {
     input_stub_->InjectMouseEvent(message->mouse_event());
   } else if (message->has_touch_event()) {
     input_stub_->InjectTouchEvent(message->touch_event());
   } else {
     LOG(WARNING) << "Unknown event message received.";
   }
 }
 
 }  // namespace protocol
 }  // namespace remoting