Add UMA metrics for Android Chrome Google Search.

components/google/core/browser/google_search_metrics.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 "components/google/core/browser/google_search_metrics.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 
 GoogleSearchMetrics::GoogleSearchMetrics() {
 }
 
 GoogleSearchMetrics::~GoogleSearchMetrics() {
 }
 
 void GoogleSearchMetrics::RecordGoogleSearch(AccessPoint ap) const {
   DCHECK_NE(AP_BOUNDARY, ap);
   UMA_HISTOGRAM_ENUMERATION("GoogleSearch.AccessPoint", ap, AP_BOUNDARY);
 }
+
+#if defined(OS_ANDROID)
+void GoogleSearchMetrics::RecordAndroidGoogleSearch(
+    AccessPoint ap,
+    bool prerender_enabled) const {
+  DCHECK_NE(AP_BOUNDARY, ap);
+  if (prerender_enabled) {
+    UMA_HISTOGRAM_ENUMERATION("GoogleSearch.AccessPoint_PrerenderEnabled",
+                              ap, AP_BOUNDARY);
+  } else {
+    UMA_HISTOGRAM_ENUMERATION("GoogleSearch.AccessPoint_PrerenderDisabled",
+                              ap, AP_BOUNDARY);
+  }
+}
+#endif