Re-optimize faster after making a pretenuring decision.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index b19f5f3f5bd492f94292268d4d2a16da55abc731..66250937fa660a269208844c2e22b6a40fe96cda 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -4564,6 +4564,21 @@ void Code::mark_as_invalidated_weak_stub() {
 }
 
 
+bool Code::marked_for_instant_optimization() {
+  ASSERT(kind() == OPTIMIZED_FUNCTION);
+  return MarkedForInstantOptimizationField::decode(
+      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
+}
+
+
+void Code::set_marked_for_instant_optimization(bool flag) {
+  ASSERT(kind() == OPTIMIZED_FUNCTION);
+  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
+  int updated = MarkedForInstantOptimizationField::update(previous, flag);
+  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
+}
+
+
 bool Code::is_inline_cache_stub() {
   Kind kind = this->kind();
   switch (kind) {