Add FilePath to base namespace.

content/common/fileapi/file_system_dispatcher.h

Index: content/common/fileapi/file_system_dispatcher.h
diff --git a/content/common/fileapi/file_system_dispatcher.h b/content/common/fileapi/file_system_dispatcher.h
index 99afa50e65aa78e93e1e7872107ea8e9c4a3b0b2..4d1171b4ee52e84dbc8b91f08e54feafff0e1f3a 100644
--- a/content/common/fileapi/file_system_dispatcher.h
+++ b/content/common/fileapi/file_system_dispatcher.h
@@ -18,10 +18,10 @@
 #include "webkit/fileapi/file_system_types.h"
 
 namespace base {
+class FilePath;
 struct PlatformFileInfo;
 }
 
-class FilePath;
 class GURL;
 
 namespace content {
@@ -102,7 +102,7 @@ class FileSystemDispatcher : public IPC::Listener {
   void OnDidSucceed(int request_id);
   void OnDidReadMetadata(int request_id,
                          const base::PlatformFileInfo& file_info,
-                         const FilePath& platform_path);
+                         const base::FilePath& platform_path);
   void OnDidReadDirectory(
       int request_id,
       const std::vector<base::FileUtilProxy::Entry>& entries,