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

src/mips64/macro-assembler-mips64.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 <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
@@ skipping 4022 matching lines @@
 void MacroAssembler::PopRegisterAsTwoSmis(Register dst, Register scratch) {
   DCHECK(!dst.is(scratch));
   pop(scratch);
   dsrl32(scratch, scratch, 0);
   pop(dst);
   dsrl32(dst, dst, 0);
   dsll32(dst, dst, 0);
   or_(dst, dst, scratch);
 }
 
-
-void MacroAssembler::DebugBreak() {
-  PrepareCEntryArgs(0);
-  PrepareCEntryFunction(
-      ExternalReference(Runtime::kHandleDebuggerStatement, isolate()));
-  CEntryStub ces(isolate(), 1);
-  DCHECK(AllowThisStubCall(&ces));
-  Call(ces.GetCode(), 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());
   li(a1, Operand(restart_fp));
   ld(a1, MemOperand(a1));
   Jump(isolate()->builtins()->FrameDropperTrampoline(), RelocInfo::CODE_TARGET,
        ne, a1, Operand(zero_reg));
 }
 
@@ skipping 2836 matching lines @@
   if (mag.shift > 0) sra(result, result, mag.shift);
   srl(at, dividend, 31);
   Addu(result, result, Operand(at));
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64