Add Keyboard Latency UMA Metrics.

content/browser/frame_host/render_widget_host_view_guest.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/frame_host/render_widget_host_view_guest.h"
 
 #include <utility>
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 599 matching lines @@
   if (event->GetType() == blink::WebInputEvent::kMouseWheel) {
     ui::LatencyInfo latency_info(ui::SourceEventType::WHEEL);
     host_->ForwardWheelEventWithLatencyInfo(
         *static_cast<const blink::WebMouseWheelEvent*>(event), latency_info);
     return;
   }
 
   if (blink::WebInputEvent::IsKeyboardEventType(event->GetType())) {
     if (!embedder->GetLastKeyboardEvent())
       return;
+    ui::LatencyInfo latency_info(ui::SourceEventType::KEY);
     NativeWebKeyboardEvent keyboard_event(*embedder->GetLastKeyboardEvent());
-    host_->ForwardKeyboardEvent(keyboard_event);
+    host_->ForwardKeyboardEventWithLatencyInfo(keyboard_event, latency_info);
     return;
   }
 
   if (blink::WebInputEvent::IsTouchEventType(event->GetType())) {
     if (event->GetType() == blink::WebInputEvent::kTouchStart &&
         !embedder->GetView()->HasFocus()) {
       embedder->GetView()->Focus();
     }
     ui::LatencyInfo latency_info(ui::SourceEventType::TOUCH);
     host_->ForwardTouchEventWithLatencyInfo(
@@ skipping 21 matching lines @@
     host_->ForwardGestureEvent(gesture_event);
     return;
   }
 }
 
 bool RenderWidgetHostViewGuest::HasEmbedderChanged() {
   return guest_ && guest_->has_attached_since_surface_set();
 }
 
 }  // namespace content