Make assertion scopes thread safe.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index 29d86161819a5ec8aad048c52ebcd7fc3a5fcf4a..40015010d11dc32f8bb74fc8f4245e7ea2c004df 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -2478,7 +2478,7 @@ void MarkCompactCollector::ClearNonLiveMapTransitions(Map* map,
 
 
 void MarkCompactCollector::ClearAndDeoptimizeDependentCode(Map* map) {
-  AssertNoAllocation no_allocation_scope;
+  DisallowHeapAllocation no_allocation;
   DependentCode* entries = map->dependent_code();
   DependentCode::GroupStartIndexes starts(entries);
   int number_of_entries = starts.number_of_entries();
@@ -2495,7 +2495,7 @@ void MarkCompactCollector::ClearAndDeoptimizeDependentCode(Map* map) {
 
 
 void MarkCompactCollector::ClearNonLiveDependentCode(Map* map) {
-  AssertNoAllocation no_allocation_scope;
+  DisallowHeapAllocation no_allocation;
   DependentCode* entries = map->dependent_code();
   DependentCode::GroupStartIndexes starts(entries);
   int number_of_entries = starts.number_of_entries();