Revert of [compiler] Drop the CompareNilIC.

src/mips/interface-descriptors-mips.cc

Index: src/mips/interface-descriptors-mips.cc
diff --git a/src/mips/interface-descriptors-mips.cc b/src/mips/interface-descriptors-mips.cc
index f8b2876313a4496f8f813778ca852f1ecdec98a1..fdb43f325cab342877aefd6e4de6ac3653a5de0c 100644
--- a/src/mips/interface-descriptors-mips.cc
+++ b/src/mips/interface-descriptors-mips.cc
@@ -318,6 +318,13 @@
 }
 
 
+void CompareNilDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {a0};
+  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
+}
+
+
 void ToBooleanDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {a0};