Notify CloseFile from Pepper to FileSystem.

webkit/fileapi/file_system_operation.cc

Index: webkit/fileapi/file_system_operation.cc
diff --git a/webkit/fileapi/file_system_operation.cc b/webkit/fileapi/file_system_operation.cc
index 5c77024848a5d55852bc0472dd6ff94325012999..ddb7e02306ef03878ea3331a9088c6b2609711eb 100644
--- a/webkit/fileapi/file_system_operation.cc
+++ b/webkit/fileapi/file_system_operation.cc
@@ -398,6 +398,12 @@ void FileSystemOperation::OpenFile(const GURL& path_url,
                  base::kNullProcessHandle));
 }
 
+void FileSystemOperation::NotifyCloseFile(const GURL& path,
+                                          const StatusCallback& callback) {
+  // No particular task to do. Just returning.
+  callback.Run(base::PLATFORM_FILE_OK);
+}
+
 // We can only get here on a write or truncate that's not yet completed.
 // We don't support cancelling any other operation at this time.
 void FileSystemOperation::Cancel(const StatusCallback& cancel_callback) {