MIPS: Do not cache CodeStubInterfaceDescriptor on the isolate.

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index a0b044040932bbe13a77b0de48e1c988f48c80f4..3b3ca689acb6342c5bfbdf95c2a8cd08c3b21430 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -2392,10 +2392,10 @@ LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
     return DefineAsSpilled(result, spill_index);
   } else {
     DCHECK(info()->IsStub());
-    CodeStubInterfaceDescriptor* descriptor =
-        info()->code_stub()->GetInterfaceDescriptor();
+    CodeStubInterfaceDescriptor descriptor;
+    info()->code_stub()->InitializeInterfaceDescriptor(&descriptor);
     int index = static_cast<int>(instr->index());
-    Register reg = descriptor->GetEnvironmentParameterRegister(index);
+    Register reg = descriptor.GetEnvironmentParameterRegister(index);
     return DefineFixed(result, reg);
   }
 }