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

chrome/android/java/src/org/chromium/chrome/browser/metrics/LaunchMetrics.java

 // Copyright 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.
 
 package org.chromium.chrome.browser.metrics;
 
 import android.util.Pair;
 
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.metrics.RecordHistogram;
@@ skipping 172 matching lines @@
      */
     public static void recordWebappHistogramTimes(long time) {
         sWebappHistogramTimes.add(time);
     }
 
     /**
      * Calls out to native code to record URLs that have been launched via the Home screen.
      * This intermediate step is necessary because Activity.onCreate() may be called when
      * the native library has not yet been loaded.
      * @param webContents WebContents for the current Tab.
-     * @param application The ChromeApplication object.
      */
     public static void commitLaunchMetrics(WebContents webContents) {
         for (Pair<String, Integer> item : sActivityUrls) {
             nativeRecordLaunch(true, item.first, item.second, webContents);
         }
         sActivityUrls.clear();
 
         for (Pair<String, Integer> item : sTabUrls) {
             nativeRecordLaunch(false, item.first, item.second, webContents);
         }
         sTabUrls.clear();
 
         // Record generic cached events.
         for (CachedHistogram event : CachedHistogram.sEvents) event.commitAndClear();
     }
 
+    /**
+     * Records metrics about the state of the homepage on launch.
+     * @param showHomeButton Whether the home button is shown.
+     * @param homepageIsNtp Whether the homepage is set to the NTP.
+     * @param homepageUrl The value of the homepage URL.
+     */
+    public static void recordHomePageLaunchMetrics(
+            boolean showHomeButton, boolean homepageIsNtp, String homepageUrl) {
+        nativeRecordHomePageLaunchMetrics(showHomeButton, homepageIsNtp, homepageUrl);
+    }
+
     private static native void nativeRecordLaunch(
             boolean standalone, String url, int source, WebContents webContents);
+    private static native void nativeRecordHomePageLaunchMetrics(
+            boolean showHomeButton, boolean homepageIsNtp, String homepageUrl);
 }