[Manifest] Add metrics recording.

chrome/browser/android/shortcut_helper.cc

 // Copyright 2013 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/shortcut_helper.h"
 
 #include <jni.h>
 #include <limits>
 
 #include "base/android/jni_android.h"
@@ skipping 213 matching lines @@
   // scale factor. If none, another pass will be run using kDefaultDensity.
   if (!url.is_valid())
     url = FindBestMatchingIcon(icons, device_scale_factor);
   if (!url.is_valid())
     url = FindBestMatchingIcon(icons, Manifest::Icon::kDefaultDensity);
 
   return url;
 }
 
 void ShortcutHelper::OnDidGetManifest(const content::Manifest& manifest) {
+  if (!manifest.IsEmpty()) {
+      content::RecordAction(
+          base::UserMetricsAction("webapps.AddShortcut.Manifest"));
+  }
+
   // Set the title based on the manifest value, if any.
   if (!manifest.short_name.is_null())
     title_ = manifest.short_name.string();
   else if (!manifest.name.is_null())
     title_ = manifest.name.string();
 
   // Set the url based on the manifest value, if any.
   if (manifest.start_url.is_valid())
     url_ = manifest.start_url;
 
@@ skipping 231 matching lines @@
       base::android::GetApplicationContext(),
       java_url.obj(),
       java_title.obj(),
       java_bitmap.obj(),
       r_value,
       g_value,
       b_value,
       display == content::Manifest::DISPLAY_MODE_STANDALONE,
       orientation);
 }