Notify CloseFile from Pepper to FileSystem.

chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc

Index: chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc b/chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc
index 7f6e882cdc0be9bd4f9342da2c032e8b053d05aa..19a8225b6107693b2d95180b078d25010c97aac6 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc
+++ b/chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc
@@ -403,6 +403,12 @@ void GDataFileSystemProxy::OpenFile(
                               GetDownloadDataCallback());
 }
 
+void GDataFileSystemProxy::NotifyCloseFile(const FileSystemURL& url) {
+  // TODO(kinaba,zelidrag): crbug.com/132236.
+  // Once OpenFile() for writing is implemented, we also need to implement the
+  // corresponding NotifyCloseFile for committing dirty cache.
+}
+
 void GDataFileSystemProxy::CreateSnapshotFile(
     const FileSystemURL& file_url,
     const FileSystemOperationInterface::SnapshotFileCallback& callback) {