Revert "Every place where AllocationMemento is initialized with an"

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 6c81518f316112bf0eac5236207a0005380ee5c2..23c373fa0b461e7a911ec9ac90a9575ea7f36feb 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -1831,20 +1831,6 @@ HValue* HGraphBuilder::BuildCreateAllocationMemento(HValue* previous_object,
   Handle<Map> alloc_memento_map(
       isolate()->heap()->allocation_memento_map());
   AddStoreMapConstant(alloc_memento, alloc_memento_map);
-
-  // TODO(mvstanton): the code below is turned on to diagnose chromium bug
-  // 284577.
-  Handle<Map> alloc_site_map(isolate()->heap()->allocation_site_map());
-  IfBuilder builder(this);
-  // Read the map
-  HValue* map_field = Add<HLoadNamedField>(alloc_site,
-                                           HObjectAccess::ForMap());
-  HValue* alloc_site_map_value = Add<HConstant>(alloc_site_map);
-  builder.IfNot<HCompareObjectEqAndBranch>(map_field, alloc_site_map_value);
-  builder.Then();
-  AddInstruction(new(zone()) HDebugBreak());
-  builder.End();
-
   HObjectAccess access = HObjectAccess::ForAllocationMementoSite();
   Add<HStoreNamedField>(alloc_memento, access, alloc_site);
   return alloc_memento;