Add a default share button to the menu of Custom Tabs

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabAppMenuPropertiesDelegate.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.customtabs;
 
 import android.view.Menu;
 import android.view.MenuItem;
 
 import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.appmenu.AppMenuPropertiesDelegate;
 import org.chromium.chrome.browser.tab.Tab;
 
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
 /**
  * App menu properties delegate for {@link CustomTabActivity}.
  */
 public class CustomTabAppMenuPropertiesDelegate extends AppMenuPropertiesDelegate {
     private boolean mIsCustomEntryAdded;
+    private boolean mShowShare;
     private List<String> mMenuEntries;
     private Map<MenuItem, Integer> mItemToIndexMap = new HashMap<MenuItem, Integer>();
     /**
      * Creates an {@link CustomTabAppMenuPropertiesDelegate} instance.
      */
-    public CustomTabAppMenuPropertiesDelegate(ChromeActivity activity, List<String> menuEntries) {
+    public CustomTabAppMenuPropertiesDelegate(ChromeActivity activity, List<String> menuEntries,
+            boolean showShare) {
         super(activity);
         mMenuEntries = menuEntries;
+        mShowShare = showShare;
     }
 
     @Override
     public void prepareMenu(Menu menu) {
         Tab currentTab = mActivity.getActivityTab();
         if (currentTab != null) {
             MenuItem forwardMenuItem = menu.findItem(R.id.forward_menu_id);
             forwardMenuItem.setEnabled(currentTab.canGoForward());
 
             mReloadMenuItem = menu.findItem(R.id.reload_menu_id);
             mReloadMenuItem.setIcon(R.drawable.btn_reload_stop);
             loadingStateChanged(currentTab.isLoading());
 
+            MenuItem shareItem = menu.findItem(R.id.share_menu_id);
+            shareItem.setVisible(mShowShare);
+            shareItem.setEnabled(mShowShare);
+
             MenuItem openInChromeItem = menu.findItem(R.id.open_in_chrome_id);
             openInChromeItem.setTitle(mActivity.getString(R.string.menu_open_in_product,
                     mActivity.getString(R.string.app_name)));
 
             // Add custom menu items. Make sure they are only added once.
             if (!mIsCustomEntryAdded) {
                 mIsCustomEntryAdded = true;
                 for (int i = 0; i < mMenuEntries.size(); i++) {
                     MenuItem item = menu.add(0, 0, 1, mMenuEntries.get(i));
                     mItemToIndexMap.put(item, i);
@@ skipping 23 matching lines @@
      * the same title, a random one will be returned. This method is for testing purpose _only_.
      */
     @VisibleForTesting
     MenuItem getMenuItemForTitle(String title) {
         for (MenuItem item : mItemToIndexMap.keySet()) {
             if (item.getTitle().equals(title)) return item;
         }
         return null;
     }
 }