Fix printf formats

src/heap/gc-idle-time-handler.cc

Index: src/heap/gc-idle-time-handler.cc
diff --git a/src/heap/gc-idle-time-handler.cc b/src/heap/gc-idle-time-handler.cc
index 972dfa6e5cf9ef12165f1b685c63a02e0d321d18..0c411f7b4c2e71bbaecf8d0e5cd9a3bcffa08953 100644
--- a/src/heap/gc-idle-time-handler.cc
+++ b/src/heap/gc-idle-time-handler.cc
@@ -41,8 +41,7 @@ void GCIdleTimeAction::Print() {
 void GCIdleTimeHeapState::Print() {
   PrintF("contexts_disposed=%d ", contexts_disposed);
   PrintF("contexts_disposal_rate=%f ", contexts_disposal_rate);
-  PrintF("size_of_objects=%" V8_SIZET_PREFIX V8_PTR_PREFIX "d ",
-         size_of_objects);
+  PrintF("size_of_objects=%" PRIuS " ", size_of_objects);
   PrintF("incremental_marking_stopped=%d ", incremental_marking_stopped);
 }