Notify CloseFile from Pepper to FileSystem.

webkit/plugins/ppapi/ppb_file_io_impl.cc

Index: webkit/plugins/ppapi/ppb_file_io_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_file_io_impl.cc b/webkit/plugins/ppapi/ppb_file_io_impl.cc
index d1022709bbf48801b1fad183f63527e9f8349f14..94c4b7bc6357c97d86df20c9ae01592507969d1b 100644
--- a/webkit/plugins/ppapi/ppb_file_io_impl.cc
+++ b/webkit/plugins/ppapi/ppb_file_io_impl.cc
@@ -210,9 +210,13 @@ int32_t PPB_FileIO_Impl::FlushValidated(
 void PPB_FileIO_Impl::Close() {
   PluginDelegate* plugin_delegate = GetPluginDelegate();
   if (file_ != base::kInvalidPlatformFileValue && plugin_delegate) {
+    base::FileUtilProxy::StatusCallback callback;
+    if (!file_system_url_.is_empty()) {
+      callback = plugin_delegate->GetCloseFileSystemURLCallback(
+          file_system_url_);
+    }
     base::FileUtilProxy::Close(
-        plugin_delegate->GetFileThreadMessageLoopProxy(), file_,
-        base::FileUtilProxy::StatusCallback());
+        plugin_delegate->GetFileThreadMessageLoopProxy(), file_, callback);
     file_ = base::kInvalidPlatformFileValue;
     quota_file_io_.reset();
   }