Add Keyboard Latency UMA Metrics.

chrome/browser/android/vr_shell/vr_input_manager.cc

 // Copyright 2016 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 "chrome/browser/android/vr_shell/vr_input_manager.h"
 
 #include <memory>
 
 #include "base/task_runner_util.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 88 matching lines @@
     rwh->ForwardMouseEvent(mouse_event);
 }
 
 void VrInputManager::ForwardKeyboardEvent(
     const content::NativeWebKeyboardEvent& keyboard_event) {
   content::RenderWidgetHostView* rwhv =
       web_contents_->GetRenderWidgetHostView();
   if (rwhv == nullptr)
     return;
   content::RenderWidgetHost* rwh = rwhv->GetRenderWidgetHost();
+  ui::LatencyInfo latency_info(ui::SourceEventType::KEY);
+  latency_info.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0);
   if (rwh)
-    rwh->ForwardKeyboardEvent(keyboard_event);
+    rwh->ForwardKeyboardEventWithLatencyInfo(keyboard_event, latency_info);
 }
 
 }  // namespace vr_shell