[Chrome Shell]Added code to regain focus on selection of any item from options menu.

chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java

 // Copyright 2014 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.shell;
 
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.ViewGroup;
 import android.widget.Toast;
 
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.BaseSwitches;
 import org.chromium.base.CommandLine;
 import org.chromium.base.ContentUriUtils;
 import org.chromium.base.MemoryPressureListener;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.library_loader.ProcessInitException;
 import org.chromium.chrome.browser.DevToolsServer;
@@ skipping 258 matching lines @@
             mAppMenuHandler.showAppMenu(findViewById(R.id.menu_button), true, false);
             return true;
         }
         return super.onKeyDown(keyCode, event);
     }
 
     @SuppressWarnings("deprecation")
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         ChromeShellTab activeTab = getActiveTab();
+        if (activeTab != null) {
+            ViewGroup containerView = activeTab.getContentViewCore().getContainerView();
+            if (containerView.isFocusable() && containerView.isFocusableInTouchMode()) {
+                containerView.requestFocus();
+            }
+        }
         switch (item.getItemId()) {
             case R.id.signin:
                 if (ChromeSigninController.get(this).isSignedIn()) {
                     SyncController.openSignOutDialog(getFragmentManager());
                 } else if (AccountManagerHelper.get(this).hasGoogleAccounts()) {
                     SyncController.openSigninDialog(getFragmentManager());
                 } else {
                     Toast.makeText(this, R.string.signin_no_account, Toast.LENGTH_SHORT).show();
                 }
                 return true;
@@ skipping 96 matching lines @@
     @VisibleForTesting
     public static void setActivityWindowAndroidFactory(ActivityWindowAndroidFactory factory) {
         sWindowAndroidFactory = factory;
     }
 
     @VisibleForTesting
     public static void setAppMenuHandlerFactory(AppMenuHandlerFactory factory) {
         sAppMenuHandlerFactory = factory;
     }
 }