Use a dictionary-mode code cache on the map rather than a dual system.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 66714e126d47fc39131cce8ce97ba58d60aa61a6..eff7c4d4e7189c61e6169a1b35e94af39315e21e 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -4050,8 +4050,8 @@ void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) {
   __ bind(&not_array);
   __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
   __ Branch(&miss, ne, at, Operand(feedback));
-  Code::Flags code_flags = Code::RemoveTypeAndHolderFromFlags(
-      Code::ComputeHandlerFlags(Code::LOAD_IC));
+  Code::Flags code_flags =
+      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::LOAD_IC));
   masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags,
                                                receiver, name, feedback,
                                                receiver_map, scratch1, t5);
@@ -4192,8 +4192,8 @@ void VectorStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) {
   __ bind(&not_array);
   __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
   __ Branch(&miss, ne, feedback, Operand(at));
-  Code::Flags code_flags = Code::RemoveTypeAndHolderFromFlags(
-      Code::ComputeHandlerFlags(Code::STORE_IC));
+  Code::Flags code_flags =
+      Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, Code::STORE_IC, code_flags, receiver, key, feedback, receiver_map,
       scratch1, scratch2);