Use non volatile lock words in semispace collector.

GSS FormulaEvaluationActions.EvaluateAndApplyChanges:
Before GC time: 9.1s
After GC time: 7.98s

Fixed timing logger errors.

Change-Id: I4193c6ccbbbe7a7220dfaabbf3472a5dcebae616
diff --git a/runtime/mirror/object-inl.h b/runtime/mirror/object-inl.h
index a6db387..2505855 100644
--- a/runtime/mirror/object-inl.h
+++ b/runtime/mirror/object-inl.h
@@ -51,13 +51,14 @@
       OFFSET_OF_OBJECT_MEMBER(Object, klass_), new_klass, false);
 }
 
-inline LockWord Object::GetLockWord() {
-  return LockWord(GetField32(OFFSET_OF_OBJECT_MEMBER(Object, monitor_), true));
+inline LockWord Object::GetLockWord(bool is_volatile) {
+  return LockWord(GetField32(OFFSET_OF_OBJECT_MEMBER(Object, monitor_), is_volatile));
 }
 
-inline void Object::SetLockWord(LockWord new_val) {
+inline void Object::SetLockWord(LockWord new_val, bool is_volatile) {
   // Force use of non-transactional mode and do not check.
-  SetField32<false, false>(OFFSET_OF_OBJECT_MEMBER(Object, monitor_), new_val.GetValue(), true);
+  SetField32<false, false>(OFFSET_OF_OBJECT_MEMBER(Object, monitor_), new_val.GetValue(),
+                           is_volatile);
 }
 
 inline bool Object::CasLockWord(LockWord old_val, LockWord new_val) {