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

chrome/browser/ui/cocoa/profile_menu_controller_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 "chrome/browser/ui/cocoa/profile_menu_controller.h"
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 231 matching lines @@
   const bool io_was_allowed = base::ThreadRestrictions::SetIOAllowed(false);
   [controller() activeBrowserChangedTo:NULL];
   base::ThreadRestrictions::SetIOAllowed(io_was_allowed);
 }
 
 TEST_F(ProfileMenuControllerTest, ManagedProfile) {
   TestingProfileManager* manager = testing_profile_manager();
   TestingProfile* managed_profile =
       manager->CreateTestingProfile("test1",
                                     scoped_ptr<PrefServiceSyncable>(),
-                                    ASCIIToUTF16("Supervised User"),
+                                    base::ASCIIToUTF16("Supervised User"),
                                     0,
                                     "TEST_ID",
                                     TestingProfile::TestingFactories());
   BrowserList::SetLastActive(browser());
 
   NSMenu* menu = [controller() menu];
   ASSERT_EQ(6, [menu numberOfItems]);
   NSMenuItem* item = [menu itemAtIndex:0];
   ASSERT_EQ(@selector(switchToProfileFromMenu:), [item action]);
   EXPECT_TRUE([controller() validateMenuItem:item]);
@@ skipping 18 matching lines @@
   EXPECT_FALSE([controller() validateMenuItem:item]);
 
   item = [menu itemAtIndex:1];
   ASSERT_EQ(@selector(switchToProfileFromMenu:), [item action]);
   EXPECT_TRUE([controller() validateMenuItem:item]);
 
   item = [menu itemAtIndex:5];
   ASSERT_EQ(@selector(newProfile:), [item action]);
   EXPECT_FALSE([controller() validateMenuItem:item]);
 }