Rework CallApi*Stubs.

src/x87/interface-descriptors-x87.cc

Index: src/x87/interface-descriptors-x87.cc
diff --git a/src/x87/interface-descriptors-x87.cc b/src/x87/interface-descriptors-x87.cc
index 5cf27ac7f3b8179f36395a198ded6f57cedba380..349364bf4e4a224738658147a0efae4e951bdbd2 100644
--- a/src/x87/interface-descriptors-x87.cc
+++ b/src/x87/interface-descriptors-x87.cc
@@ -387,21 +387,7 @@ void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
-
-void ApiFunctionDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {
-      edi,  // callee
-      ebx,  // call_data
-      ecx,  // holder
-      edx,  // api_function_address
-      eax,  // actual number of arguments
-  };
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
-
-void ApiAccessorDescriptor::InitializePlatformSpecific(
+void ApiCallbackDescriptorBase::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
       edi,  // callee