Rework CallApi*Stubs.

src/arm64/interface-descriptors-arm64.cc

Index: src/arm64/interface-descriptors-arm64.cc
diff --git a/src/arm64/interface-descriptors-arm64.cc b/src/arm64/interface-descriptors-arm64.cc
index 169c709a274a3da97bfb80e1a878a6357d148fc2..25cacc2b8569420c8674e318234556207982ac2f 100644
--- a/src/arm64/interface-descriptors-arm64.cc
+++ b/src/arm64/interface-descriptors-arm64.cc
@@ -436,25 +436,7 @@ void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
                                    &default_descriptor);
 }
 
-
-void ApiFunctionDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  static PlatformInterfaceDescriptor default_descriptor =
-      PlatformInterfaceDescriptor(CAN_INLINE_TARGET_ADDRESS);
-
-  Register registers[] = {
-      x0,  // callee
-      x4,  // call_data
-      x2,  // holder
-      x1,  // api_function_address
-      x3,  // actual number of arguments
-  };
-  data->InitializePlatformSpecific(arraysize(registers), registers,
-                                   &default_descriptor);
-}
-
-
-void ApiAccessorDescriptor::InitializePlatformSpecific(
+void ApiCallbackDescriptorBase::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   static PlatformInterfaceDescriptor default_descriptor =
       PlatformInterfaceDescriptor(CAN_INLINE_TARGET_ADDRESS);