Reuse RelocInfo's IsPatchedDebugBreakSlotSequence() implementation.

src/x64/debug-x64.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 "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 30 matching lines @@
 // having been patched with a call instruction.
 bool Debug::IsDebugBreakAtReturn(v8::internal::RelocInfo* rinfo) {
   ASSERT(RelocInfo::IsJSReturn(rinfo->rmode()));
   return rinfo->IsPatchedReturnSequence();
 }
 
 
 bool BreakLocationIterator::IsDebugBreakAtSlot() {
   ASSERT(IsDebugBreakSlot());
   // Check whether the debug break slot instructions have been patched.
-  return !Assembler::IsNop(rinfo()->pc());
+  return rinfo()->IsPatchedDebugBreakSlotSequence();
 }
 
 
 void BreakLocationIterator::SetDebugBreakAtSlot() {
   ASSERT(IsDebugBreakSlot());
   rinfo()->PatchCodeWithCall(
       debug_info_->GetIsolate()->builtins()->Slot_DebugBreak()->entry(),
       Assembler::kDebugBreakSlotLength - Assembler::kCallSequenceLength);
 }
 
@@ skipping 245 matching lines @@
   __ jmp(rdx);
 }
 
 const bool LiveEdit::kFrameDropperSupported = true;
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64