Make FileSystemOperation NOT self-destruct

webkit/browser/fileapi/file_system_operation.h

Index: webkit/browser/fileapi/file_system_operation.h
diff --git a/webkit/browser/fileapi/file_system_operation.h b/webkit/browser/fileapi/file_system_operation.h
index b901f1e2b8399b2d4148d6bfa2014120e5eae925..8cc015e5ba9b4e00ae5d81fc2659476e04918260 100644
--- a/webkit/browser/fileapi/file_system_operation.h
+++ b/webkit/browser/fileapi/file_system_operation.h
@@ -47,12 +47,12 @@ class LocalFileSystemOperation;
 // GetMetadata, ReadDirectory and Remove) may be called during the
 // lifetime of this object and it should be called no more than once.
 //
-// 2) Be self-destructed, or get deleted via base::Owned() after the
-// operation finishes and completion callback is called.
-//
-// 3) Deliver the results of operations to the client via the callback function
+// 2) Deliver the results of operations to the client via the callback function
 // passed as the last parameter of the method.
 //
+// Note that it is valid to delete an operation while it is running.
+// The callback will NOT be fired if the operation is deleted before
+// it gets called.
 class FileSystemOperation {
  public:
   virtual ~FileSystemOperation() {}