Implement request mobile site.

ios/chrome/browser/ui/tools_menu/tools_menu_view_controller_unittest.mm

 // Copyright 2016 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.
 
 #import "ios/chrome/browser/ui/tools_menu/tools_menu_view_controller.h"
 
 #import "base/mac/scoped_nsobject.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_menu_configuration.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_menu_view_item.h"
@@ skipping 51 matching lines @@
   ToolsMenuViewItem* desktop_item =
       GetToolsMenuViewItemWithTag(IDC_REQUEST_DESKTOP_SITE);
   ASSERT_TRUE(desktop_item);
   EXPECT_TRUE(desktop_item.active);
 
   ToolsMenuViewItem* mobile_item =
       GetToolsMenuViewItemWithTag(IDC_REQUEST_MOBILE_SITE);
   EXPECT_FALSE(mobile_item);
 }
 
-// Tests that "Request Desktop Site" is visible and not enabled, and
-// "Request Mobile Site" is invisible when the current page is a web page and
-// uses DESKTOP user agent.
+// Tests that "Request Desktop Site" is invisible, and "Request Mobile Site" is
+// visible and enabled when the current page is a web page and uses DESKTOP user
+// agent.
 TEST_F(ToolsMenuViewControllerTest, TestUserAgentTypeDESKTOP) {
   [configuration_ setUserAgentType:web::UserAgentType::DESKTOP];
   [controller_ initializeMenuWithConfiguration:configuration_.get()];
 
   ToolsMenuViewItem* desktop_item =
       GetToolsMenuViewItemWithTag(IDC_REQUEST_DESKTOP_SITE);
-  ASSERT_TRUE(desktop_item);
-  EXPECT_FALSE(desktop_item.active);
+  EXPECT_FALSE(desktop_item);
 
   ToolsMenuViewItem* mobile_item =
       GetToolsMenuViewItemWithTag(IDC_REQUEST_MOBILE_SITE);
-  EXPECT_FALSE(mobile_item);
+  ASSERT_TRUE(mobile_item);
+  EXPECT_TRUE(mobile_item.active);
 }