[stubs] An easier way of defining a stub call interface descriptor.

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index a5819d01188745fe3c6d2286d315d83d37477b3f..e0d0998770e403a092a8dfcfbca2e933a88676af 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -43,9 +43,8 @@ FunctionType* CallInterfaceDescriptor::BuildDefaultFunctionType(
   return function;
 }
 
-
 void CallInterfaceDescriptorData::InitializePlatformSpecific(
-    int register_parameter_count, Register* registers,
+    int register_parameter_count, const Register* registers,
     PlatformInterfaceDescriptor* platform_descriptor) {
   platform_specific_descriptor_ = platform_descriptor;
   register_param_count_ = register_parameter_count;
@@ -190,12 +189,6 @@ void TypeConversionDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
-void HasPropertyDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {KeyRegister(), ObjectRegister()};
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
 void MathPowTaggedDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {exponent()};