MIPS: Get CallInterfaceDescriptor directly from CodeStub.

src/mips64/lithium-mips64.cc

Index: src/mips64/lithium-mips64.cc
diff --git a/src/mips64/lithium-mips64.cc b/src/mips64/lithium-mips64.cc
index 649361441b67c76c86e8bb074ce714631f89589c..baeae9f8aa3dd8146e53aa06a062850ffb7935c3 100644
--- a/src/mips64/lithium-mips64.cc
+++ b/src/mips64/lithium-mips64.cc
@@ -2405,7 +2405,8 @@ 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);