X87: Get CallInterfaceDescriptor directly from CodeStub.

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 61aebdf7d80e2344b1b642db01e8d82646c8cee5..b9488d96cf7d86917978d1a3c94e17221b328b18 100644
--- a/src/x87/lithium-x87.cc
+++ b/src/x87/lithium-x87.cc
@@ -2490,7 +2490,8 @@ LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
     return DefineAsSpilled(result, spill_index);
   } else {
     DCHECK(info()->IsStub());
-    CodeStubInterfaceDescriptor descriptor(info()->code_stub());
+    CallInterfaceDescriptor descriptor =
+        info()->code_stub()->GetCallInterfaceDescriptor();
     int index = static_cast<int>(instr->index());
     Register reg = descriptor.GetEnvironmentParameterRegister(index);
     return DefineFixed(result, reg);