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

chrome/browser/android/metrics/launch_metrics.cc

Index: chrome/browser/android/metrics/launch_metrics.cc
diff --git a/chrome/browser/android/metrics/launch_metrics.cc b/chrome/browser/android/metrics/launch_metrics.cc
index 77003c611977a592b7e507fa3f7aa8deaa6f7adf..6c634ba200b7716e321f41acfec9c8572f288df6 100644
--- a/chrome/browser/android/metrics/launch_metrics.cc
+++ b/chrome/browser/android/metrics/launch_metrics.cc
@@ -12,6 +12,7 @@
 #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"
@@ -87,4 +88,17 @@ static void RecordLaunch(JNIEnv* env,
                                           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