split api call stubs into accessor and function call 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 6e77ee474af8638f8ece2193e5a94f0806eb0d60..238cdd71345a379d6863513fabe6d8580a0ba695 100644
--- a/src/arm/interface-descriptors-arm.cc
+++ b/src/arm/interface-descriptors-arm.cc
@@ -318,6 +318,31 @@ void ApiFunctionDescriptor::Initialize(CallInterfaceDescriptorData* data) {
       r4,  // call_data
       r2,  // holder
       r1,  // api_function_address
+      r3,  // actual number of arguments
+  };
+  Representation representations[] = {
+      Representation::Tagged(),     // context
+      Representation::Tagged(),     // callee
+      Representation::Tagged(),     // call_data
+      Representation::Tagged(),     // holder
+      Representation::External(),   // api_function_address
+      Representation::Integer32(),  // actual number of arguments
+  };
+  data->Initialize(arraysize(registers), registers, representations,
+                   &default_descriptor);
+}
+
+
+void ApiAccessorDescriptor::Initialize(CallInterfaceDescriptorData* data) {
+  static PlatformInterfaceDescriptor default_descriptor =
+      PlatformInterfaceDescriptor(CAN_INLINE_TARGET_ADDRESS);
+
+  Register registers[] = {
+      cp,  // context
+      r0,  // callee
+      r4,  // call_data
+      r2,  // holder
+      r1,  // api_function_address
   };
   Representation representations[] = {
       Representation::Tagged(),    // context