Notify CloseFile from Pepper to FileSystem.

webkit/plugins/ppapi/mock_plugin_delegate.cc

Index: webkit/plugins/ppapi/mock_plugin_delegate.cc
diff --git a/webkit/plugins/ppapi/mock_plugin_delegate.cc b/webkit/plugins/ppapi/mock_plugin_delegate.cc
index e666ab411edd164889bb7e9a8acf49c5cc6d8da9..08f4f2ae06a044021d4ec21c01c20c35faea3a93 100644
--- a/webkit/plugins/ppapi/mock_plugin_delegate.cc
+++ b/webkit/plugins/ppapi/mock_plugin_delegate.cc
@@ -143,7 +143,9 @@ bool MockPluginDelegate::AsyncOpenFile(const FilePath& path,
 }
 
 bool MockPluginDelegate::AsyncOpenFileSystemURL(
-    const GURL& path, int flags, const AsyncOpenFileCallback& callback) {
+    const GURL& path,
+    int flags,
+    const AsyncOpenFileSystemURLCallback& callback) {
   return false;
 }