Reland "Enable map dependency to in-flight compilation info."

src/x64/lithium-codegen-x64.h

Index: src/x64/lithium-codegen-x64.h
diff --git a/src/x64/lithium-codegen-x64.h b/src/x64/lithium-codegen-x64.h
index 07a948c113352ccc5cfc7912306498595ab4cfe5..c3f99c4f42644f4c906270d5401b4939490478e5 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -57,8 +57,6 @@ class LCodeGen BASE_EMBEDDED {
         deoptimizations_(4, info->zone()),
         jump_table_(4, info->zone()),
         deoptimization_literals_(8, info->zone()),
-        prototype_maps_(0, info->zone()),
-        transition_maps_(0, info->zone()),
         inlined_function_count_(0),
         scope_(info->scope()),
         status_(UNUSED),
@@ -362,8 +360,6 @@ class LCodeGen BASE_EMBEDDED {
   ZoneList<LEnvironment*> deoptimizations_;
   ZoneList<Deoptimizer::JumpTableEntry> jump_table_;
   ZoneList<Handle<Object> > deoptimization_literals_;
-  ZoneList<Handle<Map> > prototype_maps_;
-  ZoneList<Handle<Map> > transition_maps_;
   int inlined_function_count_;
   Scope* const scope_;
   Status status_;