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

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 2860 matching lines @@
       Ldr(dst, MemOperand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX)));
     }
   } else {
     // Slot is in the current function context.  Move it into the
     // destination register in case we store into it (the write barrier
     // cannot be allowed to destroy the context in cp).
     Mov(dst, cp);
   }
 }
 
-
-void MacroAssembler::DebugBreak() {
-  Mov(x0, 0);
-  Mov(x1, 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());
   Mov(x1, Operand(restart_fp));
   Ldr(x1, MemOperand(x1));
   Tst(x1, x1);
   Jump(isolate()->builtins()->FrameDropperTrampoline(), RelocInfo::CODE_TARGET,
        ne);
 }
@@ skipping 1740 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64