Add UMA metrics for Bookmark widgets.

chrome/android/java/src/org/chromium/chrome/browser/bookmark/ShortcutActivity.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.bookmark;
 
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.Color;
 import android.view.ViewGroup;
 
+import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.BookmarkUtils;
+import org.chromium.chrome.browser.ShortcutHelper;
+import org.chromium.chrome.browser.Source;
 import org.chromium.chrome.browser.UrlConstants;
 import org.chromium.chrome.browser.favicon.FaviconHelper;
 import org.chromium.chrome.browser.init.AsyncInitializationActivity;
 import org.chromium.chrome.browser.ntp.BookmarksPage;
 import org.chromium.chrome.browser.ntp.BookmarksPage.BookmarkSelectedListener;
 import org.chromium.chrome.browser.partnerbookmarks.PartnerBookmarksShim;
 import org.chromium.chrome.browser.profiles.Profile;
 
 /**
  * Activity that allows the user to select a bookmark to add to their homescreen as a shortcut.
@@ skipping 42 matching lines @@
     @Override
     public void onNewTabOpened() {
     }
 
     @Override
     public void onBookmarkSelected(String url, String title, Bitmap favicon) {
         int dominantColor = FaviconHelper.getDominantColorForBitmap(favicon);
         Bitmap launcherIcon = BookmarkUtils.createLauncherIcon(this, favicon, url,
                 Color.red(dominantColor), Color.green(dominantColor), Color.blue(dominantColor));
         Intent intent = BookmarkUtils.createAddToHomeIntent(url, title, launcherIcon);
+        intent.putExtra(ShortcutHelper.EXTRA_SOURCE, Source.BOOKMARK_SHORTCUT_WIDGET);
         setResult(RESULT_OK, intent);
+        RecordUserAction.record("BookmarkShortcutWidgetAdded");
         finish();
     }
 
     @Override
     public void onResumeWithNative() { }
 
     @Override
     public void onPauseWithNative() { }
 
     @Override
     public void onStopWithNative() { }
 }