Fix parallel recompilation wrt transition maps dependency.

src/mips/lithium-codegen-mips.h

Index: src/mips/lithium-codegen-mips.h
diff --git a/src/mips/lithium-codegen-mips.h b/src/mips/lithium-codegen-mips.h
index d96755cc46cbf4b4380b377d16a2ec52eabc2ae8..ee013834b4b37c4c69c2c66780b7a2a6113ad4c6 100644
--- a/src/mips/lithium-codegen-mips.h
+++ b/src/mips/lithium-codegen-mips.h
@@ -55,7 +55,6 @@ class LCodeGen BASE_EMBEDDED {
         deoptimizations_(4, info->zone()),
         deopt_jump_table_(4, info->zone()),
         deoptimization_literals_(8, info->zone()),
-        transition_maps_(0, info->zone()),
         inlined_function_count_(0),
         scope_(info->scope()),
         status_(UNUSED),
@@ -411,7 +410,6 @@ class LCodeGen BASE_EMBEDDED {
   ZoneList<LEnvironment*> deoptimizations_;
   ZoneList<Deoptimizer::JumpTableEntry> deopt_jump_table_;
   ZoneList<Handle<Object> > deoptimization_literals_;
-  ZoneList<Handle<Map> > transition_maps_;
   int inlined_function_count_;
   Scope* const scope_;
   Status status_;