Always include debugger support.

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3168 matching lines @@
     }
   } 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);
   }
 }
 
 
-#ifdef ENABLE_DEBUGGER_SUPPORT
 void MacroAssembler::DebugBreak() {
   Mov(x0, 0);
   Mov(x1, ExternalReference(Runtime::kDebugBreak, isolate()));
   CEntryStub ces(isolate(), 1);
   ASSERT(AllowThisStubCall(&ces));
   Call(ces.GetCode(), RelocInfo::DEBUG_BREAK);
 }
-#endif
 
 
 void MacroAssembler::PushTryHandler(StackHandler::Kind kind,
                                     int handler_index) {
   ASSERT(jssp.Is(StackPointer()));
   // Adjust this code if the asserts don't hold.
   STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize);
@@ skipping 2034 matching lines @@
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64