VM: More abstract interface for generating stub calls.

runtime/vm/native_arguments.h

Index: runtime/vm/native_arguments.h
diff --git a/runtime/vm/native_arguments.h b/runtime/vm/native_arguments.h
index 8f643887ecd9fac3e9531c617e44a91bbdf476cb..3fb2f74515761b8a7975ca5adcfa74791351f7fe 100644
--- a/runtime/vm/native_arguments.h
+++ b/runtime/vm/native_arguments.h
@@ -37,8 +37,8 @@ class Thread;
 #define CHECK_STACK_ALIGNMENT { }
 #else
 #define CHECK_STACK_ALIGNMENT {                                                \
-  uword (*func)() =                                                            \
-      reinterpret_cast<uword (*)()>(StubCode::GetStackPointerEntryPoint());    \
+  uword (*func)() = reinterpret_cast<uword (*)()>(                             \
+      StubCode::GetStackPointer_entry()->EntryPoint());                        \
   uword current_sp = func();                                                   \
   ASSERT(Utils::IsAligned(current_sp, OS::ActivationFrameAlignment()));        \
 }