Add Keyboard Latency UMA Metrics.

content/browser/renderer_host/render_widget_host_view_android.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 "content/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include <utility>
 
@@ skipping 1718 matching lines @@
 
   RenderWidgetHostImpl* target_host = host_;
 
   // If there are multiple widgets on the page (such as when there are
   // out-of-process iframes), pick the one that should process this event.
   if (host_->delegate())
     target_host = host_->delegate()->GetFocusedRenderWidgetHost(host_);
   if (!target_host)
     return;
 
-  target_host->ForwardKeyboardEvent(event);
+  ui::LatencyInfo latency_info;
+  if (event.GetType() == blink::WebInputEvent::kRawKeyDown ||
+      event.GetType() == blink::WebInputEvent::kChar) {
+    latency_info.set_source_event_type(ui::SourceEventType::KEY_PRESS);
+  }
+  latency_info.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0);
+  target_host->ForwardKeyboardEventWithLatencyInfo(event, latency_info);
 }
 
 void RenderWidgetHostViewAndroid::SendMouseEvent(
     const ui::MotionEventAndroid& motion_event,
     int action_button) {
   blink::WebInputEvent::Type webMouseEventType =
       ui::ToWebMouseEventType(motion_event.GetAction());
 
   blink::WebMouseEvent mouse_event = WebMouseEventBuilder::Build(
       webMouseEventType,
@@ skipping 449 matching lines @@
 
   ui::WindowAndroidCompositor* compositor = window_android->GetCompositor();
   if (!compositor)
     return;
 
   overscroll_controller_ = base::MakeUnique<OverscrollControllerAndroid>(
       overscroll_refresh_handler, compositor, view_.GetDipScale());
 }
 
 }  // namespace content