[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 4071 matching lines @@
     Operand counter_operand = ExternalOperand(ExternalReference(counter));
     if (value == 1) {
       decl(counter_operand);
     } else {
       subl(counter_operand, Immediate(value));
     }
   }
 }
 
 
-void MacroAssembler::DebugBreak() {
-  Set(rax, 0);  // No arguments.
-  LoadAddress(rbx,
-              ExternalReference(Runtime::kHandleDebuggerStatement, isolate()));
-  CEntryStub ces(isolate(), 1);
-  DCHECK(AllowThisStubCall(&ces));
-  Call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT);
-}
-
 void MacroAssembler::PrepareForTailCall(const ParameterCount& callee_args_count,
                                         Register caller_args_count_reg,
                                         Register scratch0, Register scratch1,
                                         ReturnAddressState ra_state) {
 #if DEBUG
   if (callee_args_count.is_reg()) {
     DCHECK(!AreAliased(callee_args_count.reg(), caller_args_count_reg, scratch0,
                        scratch1));
   } else {
     DCHECK(!AreAliased(caller_args_count_reg, scratch0, scratch1));
@@ skipping 1191 matching lines @@
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64