Revert of [debugger] remove debugger statement support from FCG/CS.

src/x64/macro-assembler-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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 4070 matching lines @@
   if (FLAG_native_code_counters && counter->Enabled()) {
     Operand counter_operand = ExternalOperand(ExternalReference(counter));
     if (value == 1) {
       decl(counter_operand);
     } else {
       subl(counter_operand, Immediate(value));
     }
   }
 }
 
+void MacroAssembler::DebugBreak() {
+  Call(isolate()->builtins()->HandleDebuggerStatement(),
+       RelocInfo::DEBUGGER_STATEMENT);
+}
+
 void MacroAssembler::MaybeDropFrames() {
   // Check whether we need to drop frames to restart a function on the stack.
   ExternalReference restart_fp =
       ExternalReference::debug_restart_fp_address(isolate());
   Load(rbx, restart_fp);
   testp(rbx, rbx);
   j(not_zero, isolate()->builtins()->FrameDropperTrampoline(),
     RelocInfo::CODE_TARGET);
 }
 
@@ skipping 1201 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64