Reduce header dependencies in base/

base/clipboard_mac.mm

 // Copyright (c) 2006-2008 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/clipboard.h"
 
 #import <Cocoa/Cocoa.h>
 
+#include "base/file_path.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 
 namespace {
 
 // Would be nice if this were in UTCoreTypes.h, but it isn't
 const NSString* kUTTypeURLName = @"public.url-name";
 
 // Tells us if WebKit was the last to write to the pasteboard. There's no
@@ skipping 255 matching lines @@
   static const std::string type = base::SysNSStringToUTF8(NSHTMLPboardType);
   return type;
 }
 
 // static
 Clipboard::FormatType Clipboard::GetWebKitSmartPasteFormatType() {
   static const std::string type =
       base::SysNSStringToUTF8(kWebSmartPastePboardType);
   return type;
 }