Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

content/child/indexed_db/webidbcursor_impl.cc

Index: content/child/indexed_db/webidbcursor_impl.cc
diff --git a/content/child/indexed_db/webidbcursor_impl.cc b/content/child/indexed_db/webidbcursor_impl.cc
index 11294b688390ceab11b5412084c2ce9bf829687e..1d1119246dd2c59119c168b4fc2214ac9123e248 100644
--- a/content/child/indexed_db/webidbcursor_impl.cc
+++ b/content/child/indexed_db/webidbcursor_impl.cc
@@ -6,7 +6,9 @@
 
 #include <stddef.h>
 
+#include <memory>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "content/child/indexed_db/indexed_db_dispatcher.h"
@@ -60,8 +62,8 @@ void WebIDBCursorImpl::advance(unsigned long count,
     return;
   }
   ResetPrefetchCache();
-  dispatcher->RequestIDBCursorAdvance(
-      count, callbacks.release(), ipc_cursor_id_, transaction_id_);
+  dispatcher->RequestIDBCursorAdvance(count, std::move(callbacks),
+                                      ipc_cursor_id_, transaction_id_);
 }
 
 void WebIDBCursorImpl::continueFunction(const WebIDBKey& key,
@@ -91,7 +93,7 @@ void WebIDBCursorImpl::continueFunction(const WebIDBKey& key,
       // Request pre-fetch.
       ++pending_onsuccess_callbacks_;
       dispatcher->RequestIDBCursorPrefetch(
-          prefetch_amount_, callbacks.release(), ipc_cursor_id_);
+          prefetch_amount_, std::move(callbacks), ipc_cursor_id_);
 
       // Increase prefetch_amount_ exponentially.
       prefetch_amount_ *= 2;
@@ -105,11 +107,9 @@ void WebIDBCursorImpl::continueFunction(const WebIDBKey& key,
     ResetPrefetchCache();
   }
 
-  dispatcher->RequestIDBCursorContinue(IndexedDBKeyBuilder::Build(key),
-                                       IndexedDBKeyBuilder::Build(primary_key),
-                                       callbacks.release(),
-                                       ipc_cursor_id_,
-                                       transaction_id_);
+  dispatcher->RequestIDBCursorContinue(
+      IndexedDBKeyBuilder::Build(key), IndexedDBKeyBuilder::Build(primary_key),
+      std::move(callbacks), ipc_cursor_id_, transaction_id_);
 }
 
 void WebIDBCursorImpl::postSuccessHandlerCallback() {