Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_controller_unittest.mm

 // Copyright (c) 2012 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>
 
 #include "base/basictypes.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "chrome/browser/signin/signin_manager.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_controller.h"
 #include "chrome/browser/ui/cocoa/browser_window_controller.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #import "chrome/browser/ui/cocoa/info_bubble_window.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/notification_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 
+using base::ASCIIToUTF16;
 using content::WebContents;
 
 // Watch for bookmark pulse notifications so we can confirm they were sent.
 @interface BookmarkPulseObserver : NSObject {
   int notifications_;
 }
 @property (assign, nonatomic) int notifications;
 @end
 
 
@@ skipping 435 matching lines @@
 // Normally this would be sent up the responder tree correctly, but since
 // tests run in the background, key window and main window are never set on
 // NSApplication. Adding it to NSApplication directly removes the need for
 // worrying about what the current window with focus is.
 - (void)editBookmarkNode:(id)sender {
   EXPECT_TRUE([sender respondsToSelector:@selector(node)]);
   BookmarkBubbleControllerTest::edits_++;
 }
 
 @end