Move base/mac_util.h to base/mac and use the base::mac namespace....

chrome/browser/platform_util_mac.mm

 // Copyright (c) 2010 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 "chrome/browser/platform_util.h"
 
+#include <Carbon/Carbon.h>
 #import <Cocoa/Cocoa.h>
 #import <CoreServices/CoreServices.h>
 
 #include "app/l10n_util.h"
 #include "app/l10n_util_mac.h"
 #include "base/file_path.h"
 #include "base/logging.h"
-#include "base/mac_util.h"
 #include "base/mac/scoped_aedesc.h"
 #include "base/sys_string_conversions.h"
 #include "googleurl/src/gurl.h"
 #include "grit/generated_resources.h"
 
 namespace platform_util {
 
 void ShowItemInFolder(const FilePath& full_path) {
   DCHECK_EQ([NSThread currentThread], [NSThread mainThread]);
   NSString* path_string = base::SysUTF8ToNSString(full_path.value());
@@ skipping 175 matching lines @@
     channel = @"unknown";
   }
 
   return base::SysNSStringToUTF8(channel);
 #else
   return std::string();
 #endif
 }
 
 }  // namespace platform_util