Remove WebUI NTP on Android.

chrome/browser/ui/webui/metrics_handler.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 "chrome/browser/ui/webui/metrics_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 98 matching lines @@
   } else {
     NOTREACHED();
   }
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_METRIC_EVENT_DURATION,
       content::Source<WebContents>(tab),
       content::Details<MetricEventDurationDetails>(&details));
 }
 
 void MetricsHandler::HandleLogMouseover(const base::ListValue* args) {
+#if !defined(OS_ANDROID)
+  // Android uses native UI for NTP.
   NTPUserDataLogger::GetOrCreateFromWebContents(
       web_ui()->GetWebContents())->LogEvent(NTP_MOUSEOVER);
+#endif  // !defined(OS_ANDROID)
 }