Revert 57915 - Add final part of IPC plumbing for FileSystem API....

chrome/browser/file_system/file_system_dispatcher_host.h

Index: chrome/browser/file_system/file_system_dispatcher_host.h
===================================================================
--- chrome/browser/file_system/file_system_dispatcher_host.h	(revision 57922)
+++ chrome/browser/file_system/file_system_dispatcher_host.h	(working copy)
@@ -32,28 +32,9 @@
       int request_id,
       const string16& src_path,
       const string16& dest_path);
-  void OnCopy(
-      int request_id,
-      const string16& src_path,
-      const string16& dest_path);
-  void OnRemove(
-      int request_id,
-      const string16& path);
-  void OnReadMetadata(
-      int request_id,
-      const string16& path);
-  void OnCreate(
-      int request_id,
-      const string16& path,
-      bool exclusive,
-      bool is_directory);
-  void OnExists(
-      int request_id,
-      const string16& path,
-      bool is_directory);
-  void OnReadDirectory(
-      int request_id,
-      const string16& path);
+
+  // TODO(kinuko): add more methods.
+
   void Send(IPC::Message* message);
 
  private: