Create c/b/ui/cocoa/test and move test files to there

chrome/browser/ui/cocoa/test/cocoa_test_helper.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_COCOA_TEST_HELPER_H_

[Robert Sesek, 2016/12/09 18:58:46]

Please also update the include guards to have _TEST_ in them.

 #define CHROME_BROWSER_UI_COCOA_COCOA_TEST_HELPER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "ui/gfx/test/ui_cocoa_test_helper.h"
 
 // A test class that all tests that depend on AppKit should inherit from.
 // Sets up paths correctly, and makes sure that any windows created in the test
 // are closed down properly by the test. If you need to inherit from a
 // different test class, but need to set up the AppKit runtime environment, you
 // can call BootstrapCocoa directly from your test class. You will have to deal
 // with windows on your own though.  Note that NSApp is initialized by
 // ChromeTestSuite.
 class CocoaTest : public ui::CocoaTest {
  public:
   // Sets up paths correctly for unit tests. If you can't inherit from
   // CocoaTest but are going to be using any AppKit features directly, or
   // indirectly, you should be calling this from the c'tor or SetUp methods of
   // your test class. Note that NSApp is initialized by ChromeTestSuite.
   static void BootstrapCocoa();
 
   CocoaTest();
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_COCOA_TEST_HELPER_H_