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
diff --git a/chrome/browser/file_system/file_system_dispatcher_host.h b/chrome/browser/file_system/file_system_dispatcher_host.h
index f756ebef224f7b3614354b38bbf25312f73f8c07..0164e699e3a794f179c44aa7e5417a7c4c869423 100644
--- a/chrome/browser/file_system/file_system_dispatcher_host.h
+++ b/chrome/browser/file_system/file_system_dispatcher_host.h
@@ -30,9 +30,28 @@ class FileSystemDispatcherHost
       int request_id,
       const string16& src_path,
       const string16& dest_path);
-
-  // TODO(kinuko): add more methods.
-
+  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);
   void Send(IPC::Message* message);
 
  private: