Add monomorphic CompareNilICs and Crankshaft support

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index e29d834de110d0b616732f725ea8d8b51b84fa73..17e51878e1bc685c79b6c438e06f8003f9e9cc1a 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -139,6 +139,19 @@ void ArrayNArgumentsConstructorStub::InitializeInterfaceDescriptor(
 }
 
 
+void CompareNilICStub::InitializeInterfaceDescriptor(
+    Isolate* isolate,
+    CodeStubInterfaceDescriptor* descriptor) {
+  static Register registers[] = { eax };
+  descriptor->register_param_count_ = 1;
+  descriptor->register_params_ = registers;
+  descriptor->deoptimization_handler_ =
+      FUNCTION_ADDR(CompareNilIC_Miss);
+  descriptor->miss_handler_ =
+      ExternalReference(IC_Utility(IC::kCompareNilIC_Miss), isolate);
+}
+
+
 #define __ ACCESS_MASM(masm)