Rework CallApi*Stubs.

src/arm/interface-descriptors-arm.cc

Index: src/arm/interface-descriptors-arm.cc
diff --git a/src/arm/interface-descriptors-arm.cc b/src/arm/interface-descriptors-arm.cc
index 0adee1387fb243f5397c881c99daf419943b4069..6f0845c2169c2438f3f68ef425af5930e0362bdd 100644
--- a/src/arm/interface-descriptors-arm.cc
+++ b/src/arm/interface-descriptors-arm.cc
@@ -401,25 +401,7 @@ void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
                                    &default_descriptor);
 }
 
-
-void ApiFunctionDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  static PlatformInterfaceDescriptor default_descriptor =
-      PlatformInterfaceDescriptor(CAN_INLINE_TARGET_ADDRESS);
-
-  Register registers[] = {
-      r0,  // callee
-      r4,  // call_data
-      r2,  // holder
-      r1,  // api_function_address
-      r3,  // 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);