Revert of [compiler] Drop the CompareNilIC.

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index d62bee52039fd406d23df241a977f1b42f1190cf..fb1969d8ef7d27979557581339145dd28371c197 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -58,6 +58,7 @@
   V(InternalArrayConstructorConstantArgCount) \
   V(InternalArrayConstructor)                 \
   V(Compare)                                  \
+  V(CompareNil)                               \
   V(ToBoolean)                                \
   V(BinaryOp)                                 \
   V(BinaryOpWithAllocationSite)               \
@@ -630,6 +631,12 @@
 };
 
 
+class CompareNilDescriptor : public CallInterfaceDescriptor {
+ public:
+  DECLARE_DESCRIPTOR(CompareNilDescriptor, CallInterfaceDescriptor)
+};
+
+
 class ToBooleanDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(ToBooleanDescriptor, CallInterfaceDescriptor)