Add Keyboard Latency UMA Metrics.

content/browser/devtools/protocol/input_handler.cc

 // Copyright 2014 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 "content/browser/devtools/protocol/input_handler.h"
 
 #include <stddef.h>
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 305 matching lines @@
   }
 
   if (!host_ || !host_->GetRenderWidgetHost()) {
     callback->sendFailure(Response::InternalError());
     return;
   }
 
   host_->GetRenderWidgetHost()->Focus();
   input_queued_ = false;
   pending_key_callbacks_.push_back(std::move(callback));
-  host_->GetRenderWidgetHost()->ForwardKeyboardEvent(event);
+  host_->GetRenderWidgetHost()->ForwardKeyboardEventWithLatencyInfo(
+      event, ui::LatencyInfo());
   if (!input_queued_) {
     pending_key_callbacks_.back()->sendSuccess();
     pending_key_callbacks_.pop_back();
   }
 }
 
 void InputHandler::DispatchMouseEvent(
     const std::string& type,
     int x,
     int y,
@@ skipping 303 matching lines @@
   for (auto& callback : pending_key_callbacks_)
     callback->sendSuccess();
   pending_key_callbacks_.clear();
   for (auto& callback : pending_mouse_callbacks_)
     callback->sendSuccess();
   pending_mouse_callbacks_.clear();
 }
 
 }  // namespace protocol
 }  // namespace content