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

chrome/browser/ui/cocoa/website_settings/permission_selector_button_unittest.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/website_settings/permission_selector_button.h"
 
-#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #include "base/mac/scoped_nsobject.h"
+#import "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
 #include "chrome/browser/ui/website_settings/website_settings_ui.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 
 @interface PermissionSelectorButton (Testing)
 - (NSMenu*)permissionMenu;
 @end
 
 namespace {
 
@@ skipping 35 matching lines @@
 TEST_VIEW(PermissionSelectorButtonTest, view_);
 
 TEST_F(PermissionSelectorButtonTest, Callback) {
   NSMenu* menu = [view_ permissionMenu];
   NSMenuItem* item = [menu itemAtIndex:0];
   [[item target] performSelector:[item action] withObject:item];
   EXPECT_TRUE(got_callback_);
 }
 
 }  // namespace