Remove special debug ExternalReferences.

src/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.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "codegen.h"
 #include "debug.h"
@@ skipping 130 matching lines @@
       }
     }
 
     // Leave the internal frame.
   }
 
   // Now that the break point has been handled, resume normal execution by
   // jumping to the target address intended by the caller and that was
   // overwritten by the address of DebugBreakXXX.
   ExternalReference after_break_target =
-      ExternalReference(Debug_Address::AfterBreakTarget(), masm->isolate());
+      ExternalReference::debug_after_break_target_address(masm->isolate());
   __ mov(ip, Operand(after_break_target));
   __ ldr(ip, MemOperand(ip));
   __ Jump(ip);
 }
 
 
 void Debug::GenerateCallICStubDebugBreak(MacroAssembler* masm) {
   // Register state for CallICStub
   // ----------- S t a t e -------------
   //  -- r1 : function
@@ skipping 129 matching lines @@
   masm->Abort(kLiveEditFrameDroppingIsNotSupportedOnArm);
 }
 
 const bool Debug::kFrameDropperSupported = false;
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM