[Mac] Use the new {EXPECT,ASSERT}_NS{EQ,NE} macros where possible.

chrome/browser/cocoa/search_engine_list_model_unittest.mm

 // Copyright (c) 2009 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.
 
 #include "base/scoped_nsobject.h"
 #include "chrome/browser/cocoa/browser_test_helper.h"
 #import "chrome/browser/cocoa/search_engine_list_model.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_model.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 
 // A helper for NSNotifications. Makes a note that it's been called back.
 @interface SearchEngineListHelper : NSObject {
  @public
   BOOL sawNotification_;
 }
 @end
 
 @implementation SearchEngineListHelper
@@ skipping 74 matching lines @@
   // Still should only have 2 engines and not these newly added ones.
   EXPECT_EQ([[model_ searchEngines] count], 2U);
 
   // Since keyword3 is not in the default list, the 2nd index in the default
   // keyword list should be keyword4. Test for http://crbug.com/21898.
   template_model_->SetDefaultSearchProvider(t_url);
   EXPECT_EQ([[model_ searchEngines] count], 3U);
   EXPECT_EQ([model_ defaultIndex], 2U);
 
   NSString* defaultString = [[model_ searchEngines] objectAtIndex:2];
-  EXPECT_TRUE([@"google4" isEqualToString:defaultString]);
+  EXPECT_NSEQ(@"google4", defaultString);
 }
 
 // Make sure that when the back-end model changes that we get a notification.
 TEST_F(SearchEngineListModelTest, Notification) {
   // Add one more item to force a notification.
   TemplateURL* t_url = new TemplateURL();
   t_url->SetURL("http://www.google3.com/foo/bar", 0, 0);
   t_url->set_keyword(L"keyword3");
   t_url->set_short_name(L"google3");
   t_url->set_show_in_default_list(true);
   template_model_->Add(t_url);
 
   EXPECT_TRUE(notification_helper_.get()->sawNotification_);
 }