Our JavaScriptFrame::function_slot_object is arch independent.

src/arm/frames-arm.h

Index: src/arm/frames-arm.h
diff --git a/src/arm/frames-arm.h b/src/arm/frames-arm.h
index db6a9e52e05809edfd3c0e5acaa784b966bbef72..dcba34f0175067d450d3b7c6eb3f4a06d5c617d4 100644
--- a/src/arm/frames-arm.h
+++ b/src/arm/frames-arm.h
@@ -128,12 +128,6 @@ class JavaScriptFrameConstants : public AllStatic {
 };
 
 
-inline Object* JavaScriptFrame::function_slot_object() const {
-  const int offset = JavaScriptFrameConstants::kFunctionOffset;
-  return Memory::Object_at(fp() + offset);
-}
-
-
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_FRAMES_ARM_H_