Wired support for file truncating with RemoteFileSystemOperation::OpenFile() method (case when base…

webkit/fileapi/file_system_operation_interface.h

Index: webkit/fileapi/file_system_operation_interface.h
diff --git a/webkit/fileapi/file_system_operation_interface.h b/webkit/fileapi/file_system_operation_interface.h
index 0583b9412753ec52bbe89c735318c992652afb96..24689fbbb074f14e6a90ec4c3920b43b6049cf77 100644
--- a/webkit/fileapi/file_system_operation_interface.h
+++ b/webkit/fileapi/file_system_operation_interface.h
@@ -225,6 +225,16 @@ class FileSystemOperationInterface {
                         base::ProcessHandle peer_handle,
                         const OpenFileCallback& callback) = 0;
 
+  // Signals that the file at |path|, which was previously opened with
+  // OpenFile() call, has been closed by the caller.
+  //
+  // This function is used to give remote file systems providers opportunity to
+  // process locally modified files.
+  //
+  // This function is used only by Pepper as of writing.
+  virtual void NotifyFileClosed(const GURL& path,
+                                const StatusCallback& callback) = 0;
+
   // For downcasting to FileSystemOperation.
   // TODO(kinuko): this hack should go away once appropriate upload-stream
   // handling based on element types is supported.
@@ -261,6 +271,7 @@ class FileSystemOperationInterface {
     kOperationOpenFile,
     kOperationGetLocalPath,
     kOperationCancel,
+    kOperationFileClosed,
   };
 };