Roll back all step-in-fix-related changes

src/arm/debug-arm.cc

Index: src/arm/debug-arm.cc
diff --git a/src/arm/debug-arm.cc b/src/arm/debug-arm.cc
index e87d265e89a3562f9727c0915e5f2e2ba8b2834b..65f5eeaf00c423679c9d5271d0522b3c8201d43b 100644
--- a/src/arm/debug-arm.cc
+++ b/src/arm/debug-arm.cc
@@ -296,10 +296,9 @@ void Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
 #undef __
 
 
-Object** Debug::SetUpFrameDropperFrame(StackFrame* bottom_js_frame,
-                                       Handle<Code> code) {
+void Debug::SetUpFrameDropperFrame(StackFrame* bottom_js_frame,
+                                   Handle<Code> code) {
   UNREACHABLE();
-  return NULL;
 }
 const int Debug::kFrameDropperFrameSize = -1;