[runtime] Unify and simplify how frames are marked

src/debug/arm/debug-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 
 namespace v8 {
@@ skipping 101 matching lines @@
   ExternalReference after_break_target =
       ExternalReference::debug_after_break_target_address(masm->isolate());
   __ mov(ip, Operand(after_break_target));
   __ ldr(ip, MemOperand(ip));
   __ Jump(ip);
 }
 
 
 void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
   // Load the function pointer off of our current stack frame.
-  __ ldr(r1, MemOperand(fp,
-         StandardFrameConstants::kConstantPoolOffset - kPointerSize));
+  __ ldr(r1, MemOperand(fp, FrameDropperFrameConstants::kFunctionOffset));
 
   // Pop return address, frame and constant pool pointer (if
   // FLAG_enable_embedded_constant_pool).
   __ LeaveFrame(StackFrame::INTERNAL);
 
   ParameterCount dummy(0);
   __ FloodFunctionIfStepping(r1, no_reg, dummy, dummy);
 
   { ConstantPoolUnavailableScope constant_pool_unavailable(masm);
     // Load context from the function.
@@ skipping 14 matching lines @@
 
 
 const bool LiveEdit::kFrameDropperSupported = true;
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM