Use a direct include of strings headers in chrome/browser/ui/cocoa/.

chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/memory/scoped_nsobject.h"
-#import "base/string_util.h"
+#import "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #import "chrome/app/chrome_command_ids.h"  // For translate menu command ids.
 #include "chrome/browser/infobars/infobar_service.h"
 #import "chrome/browser/translate/translate_infobar_delegate.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #import "chrome/browser/ui/cocoa/infobars/before_translate_infobar_controller.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar.h"
 #import "chrome/browser/ui/cocoa/infobars/translate_infobar_base.h"
 #import "content/public/browser/web_contents.h"
 #include "ipc/ipc_message.h"
@@ skipping 225 matching lines @@
     translate_prefs.IncrementTranslationDeniedCount("en");
   }
   CreateInfoBar(TranslateInfoBarDelegate::BEFORE_TRANSLATE);
   BeforeTranslateInfobarController* controller =
       (BeforeTranslateInfobarController*)infobar_controller_.get();
   EXPECT_TRUE([[controller alwaysTranslateButton] superview] == nil);
   EXPECT_TRUE([[controller neverTranslateButton] superview] != nil);
 }
 
 } // namespace