Unify InstanceofStub interface descriptors.

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index f23c80b056e4c0944bd47040fbd90fa87a8b611c..fc3ad94c7f3175effa1d96efbba7204a4eaf508a 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -664,6 +664,15 @@ void StoreGlobalStub::InitializeInterfaceDescriptor(
 }
 
 
+void InstanceofStub::InitializeInterfaceDescriptor(
+    CodeStubInterfaceDescriptor* descriptor) {
+  Register registers[] = { InterfaceDescriptor::ContextRegister(),
+                           InstanceofStub::left(),
+                           InstanceofStub::right() };
+  descriptor->Initialize(MajorKey(), ARRAY_SIZE(registers), registers);
+}
+
+
 void LoadDictionaryElementPlatformStub::Generate(MacroAssembler* masm) {
   ElementHandlerCompiler::GenerateLoadDictionaryElement(masm);
 }