Add a default share button to the menu of Custom Tabs

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.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;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
@@ skipping 893 matching lines @@
     public boolean onOptionsItemSelected(MenuItem item) {
         if (item != null && onMenuOrKeyboardAction(item.getItemId(), true)) {
             return true;
         }
         return super.onOptionsItemSelected(item);
     }
 
     /**
      * Triggered when the share menu item is selected.
      * This creates and shows a share intent picker dialog or starts a share intent directly.
-     *
-     * @param currentTab The {@link Tab} a user is watching.
      * @param shareDirectly Whether it should share directly with the activity that was most
      *                      recently used to share.
      * @param isIncognito Whether currentTab is incognito.
      */
-    public void onShareMenuItemSelected(final Tab currentTab,
-            final boolean shareDirectly, boolean isIncognito) {
+    public void onShareMenuItemSelected(final boolean shareDirectly, boolean isIncognito) {
+        final Tab currentTab = getActivityTab();
         if (currentTab == null) return;
 
         final Activity mainActivity = this;
         ContentBitmapCallback callback = new ContentBitmapCallback() {
                     @Override
                     public void onFinishGetBitmap(Bitmap bitmap, int response) {
                         ShareHelper.share(shareDirectly, mainActivity, currentTab.getTitle(),
                                 currentTab.getUrl(), bitmap);
                         if (shareDirectly) {
                             RecordUserAction.record("MobileMenuDirectShare");
@@ skipping 468 matching lines @@
                 RecordUserAction.record("MobileToolbarReload");
             }
         } else if (id == R.id.info_menu_id) {
             WebsiteSettingsPopup.show(this, currentTab.getProfile(), currentTab.getWebContents());
         } else if (id == R.id.open_history_menu_id) {
             currentTab.loadUrl(
                     new LoadUrlParams(UrlConstants.HISTORY_URL, PageTransition.AUTO_TOPLEVEL));
             RecordUserAction.record("MobileMenuHistory");
             StartupMetrics.getInstance().recordOpenedHistory();
         } else if (id == R.id.share_menu_id || id == R.id.direct_share_menu_id) {
-            onShareMenuItemSelected(currentTab, id == R.id.direct_share_menu_id,
+            onShareMenuItemSelected(id == R.id.direct_share_menu_id,
                     getCurrentTabModel().isIncognito());
         } else if (id == R.id.print_id) {
             PrintingController printingController = getChromeApplication().getPrintingController();
             if (printingController != null && !printingController.isBusy()
                     && PrefServiceBridge.getInstance().isPrintingEnabled()) {
                 printingController.startPrint(new TabPrinter(currentTab),
                         new PrintManagerDelegateImpl(this));
                 RecordUserAction.record("MobileMenuPrint");
             }
         } else if (id == R.id.add_to_homescreen_id) {
@@ skipping 218 matching lines @@
     public static int getThemeId() {
         boolean useLowEndTheme =
                 SysUtils.isLowEndDevice() && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
         return (useLowEndTheme ? R.style.MainTheme_LowEnd : R.style.MainTheme);
     }
 
     private void setLowEndTheme() {
         if (getThemeId() == R.style.MainTheme_LowEnd) setTheme(R.style.MainTheme_LowEnd);
     }
 }