X87: Do not cache CodeStubInterfaceDescriptor on the isolate.

src/x87/lithium-x87.cc

Index: src/x87/lithium-x87.cc
diff --git a/src/x87/lithium-x87.cc b/src/x87/lithium-x87.cc
index 3e64f19ff425a846353fb30a6c4728b0b5813d7f..392335b6b132bfad85a971589703cd7e862237d8 100644
--- a/src/x87/lithium-x87.cc
+++ b/src/x87/lithium-x87.cc
@@ -2477,10 +2477,10 @@ 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);
   }
 }