Add FilePath to base namespace.

net/disk_cache/file.h

 // 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.
 
 // See net/disk_cache/disk_cache.h for the public interface of the cache.
 
 #ifndef NET_DISK_CACHE_FILE_H_
 #define NET_DISK_CACHE_FILE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/platform_file.h"
 #include "net/base/net_export.h"
 
+namespace base {
 class FilePath;
+}
 
 namespace disk_cache {
 
 // This interface is used to support asynchronous ReadData and WriteData calls.
 class FileIOCallback {
  public:
   // Notified of the actual number of bytes read or written. This value is
   // negative if an error occurred.
   virtual void OnFileIOComplete(int bytes_copied) = 0;
 
@@ skipping 59 matching lines @@
   bool mixed_;
   base::PlatformFile platform_file_;  // Regular, asynchronous IO handle.
   base::PlatformFile sync_platform_file_;  // Synchronous IO handle.
 
   DISALLOW_COPY_AND_ASSIGN(File);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_FILE_H_