Log some information about the state of the homepage on Android.

chrome/browser/android/metrics/launch_metrics.cc

 // Copyright (c) 2015 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/metrics/launch_metrics.h"
 
 #include "base/android/jni_string.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "base/time/time.h"
 #include "chrome/browser/android/shortcut_info.h"
 #include "chrome/browser/banners/app_banner_settings_helper.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/engagement/site_engagement_service.h"
+#include "chrome/browser/prefs/pref_metrics_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/rappor/rappor_utils.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/LaunchMetrics_jni.h"
 #include "url/gurl.h"
 
 namespace metrics {
 
 enum HomeScreenLaunch {
   HOME_SCREEN_LAUNCH_STANDALONE = 0,
@@ skipping 55 matching lines @@
   std::string rappor_metric_action = standalone ? "Launch.HomeScreen.Standalone"
                                                 : "Launch.HomeScreen.Shortcut";
 
   UMA_HISTOGRAM_ENUMERATION("Launch.HomeScreen", action,
                             HOME_SCREEN_LAUNCH_COUNT);
 
   rappor::SampleDomainAndRegistryFromGURL(g_browser_process->rappor_service(),
                                           rappor_metric_action, url);
 }
 
+static void RecordHomePageLaunchMetrics(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& caller,
+    jboolean show_home_button,
+    jboolean homepage_is_ntp,
+    const JavaParamRef<jstring>& jhomepage_url) {
+  GURL homepage_url(base::android::ConvertJavaStringToUTF8(env, jhomepage_url));
+  PrefMetricsService::RecordHomePageLaunchMetrics(
+      show_home_button,
+      homepage_is_ntp,
+      homepage_url);
+}
+
 };  // namespace metrics