Add FilePath to base namespace.

ui/base/clipboard/clipboard.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.
 
 #ifndef UI_BASE_CLIPBOARD_CLIPBOARD_H_
 #define UI_BASE_CLIPBOARD_CLIPBOARD_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 15 matching lines @@
 #include <jni.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #endif
 
 #if defined(USE_AURA) && defined(USE_X11)
 #include "base/memory/scoped_ptr.h"
 #endif
 
+namespace base {
+class FilePath;
+}
+
 namespace gfx {
 class Size;
 }
 
-class FilePath;
 class SkBitmap;
 
 #if defined(TOOLKIT_GTK)
 typedef struct _GtkClipboard GtkClipboard;
 #endif
 
 #ifdef __OBJC__
 @class NSString;
 #else
 class NSString;
@@ skipping 331 matching lines @@
   class AuraX11Details;
   scoped_ptr<AuraX11Details> aurax11_details_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(Clipboard);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CLIPBOARD_CLIPBOARD_H_