Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

storage/browser/fileapi/file_system_operation_runner.cc

Index: storage/browser/fileapi/file_system_operation_runner.cc
diff --git a/storage/browser/fileapi/file_system_operation_runner.cc b/storage/browser/fileapi/file_system_operation_runner.cc
index cc6bd3838ffc385ecb19d2ba5b12a405d1cdef37..99c2a79fbd24b7140f9ce8ca83d36755dfeaf3e6 100644
--- a/storage/browser/fileapi/file_system_operation_runner.cc
+++ b/storage/browser/fileapi/file_system_operation_runner.cc
@@ -658,7 +658,8 @@ FileSystemOperationRunner::BeginOperation(
     FileSystemOperation* operation,
     base::WeakPtr<BeginOperationScoper> scope) {
   OperationHandle handle;
-  handle.id = operations_.Add(operation);
+  handle.id = operations_.Add(
+      std::unique_ptr<FileSystemOperation>(operation));
   handle.scope = scope;
   return handle;
 }