[compiler] Remove CodeStub from CompilationInfo

src/crankshaft/mips64/lithium-mips64.cc

Index: src/crankshaft/mips64/lithium-mips64.cc
diff --git a/src/crankshaft/mips64/lithium-mips64.cc b/src/crankshaft/mips64/lithium-mips64.cc
index 129f61587f56014f691a06e219bc7c30eec2dfb4..c182b0b25d330ed1f58bb27ea50238e62292bcec 100644
--- a/src/crankshaft/mips64/lithium-mips64.cc
+++ b/src/crankshaft/mips64/lithium-mips64.cc
@@ -2401,8 +2401,7 @@ LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
     return DefineAsSpilled(result, spill_index);
   } else {
     DCHECK(info()->IsStub());
-    CallInterfaceDescriptor descriptor =
-        info()->code_stub()->GetCallInterfaceDescriptor();
+    CallInterfaceDescriptor descriptor = graph()->descriptor();
     int index = static_cast<int>(instr->index());
     Register reg = descriptor.GetRegisterParameter(index);
     return DefineFixed(result, reg);