Always include debugger support.

src/x64/assembler-x64-inl.h

Index: src/x64/assembler-x64-inl.h
diff --git a/src/x64/assembler-x64-inl.h b/src/x64/assembler-x64-inl.h
index 1c52f009441ca134011143d95108b630683ab56c..95e96729fde6055c64284f946280ef0528ede085 100644
--- a/src/x64/assembler-x64-inl.h
+++ b/src/x64/assembler-x64-inl.h
@@ -393,12 +393,8 @@ bool RelocInfo::IsPatchedReturnSequence() {
   //  movq(rsp, rbp); pop(rbp); ret(n); int3 *6
   // The 11th byte is int3 (0xCC) in the return sequence and
   // REX.WB (0x48+register bit) for the call sequence.
-#ifdef ENABLE_DEBUGGER_SUPPORT
   return pc_[Assembler::kMoveAddressIntoScratchRegisterInstructionLength] !=
          0xCC;
-#else
-  return false;
-#endif
 }
 
 
@@ -484,14 +480,12 @@ void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
     CPU::FlushICache(pc_, sizeof(Address));
   } else if (RelocInfo::IsCodeAgeSequence(mode)) {
     visitor->VisitCodeAgeSequence(this);
-#ifdef ENABLE_DEBUGGER_SUPPORT
   } else if (((RelocInfo::IsJSReturn(mode) &&
               IsPatchedReturnSequence()) ||
              (RelocInfo::IsDebugBreakSlot(mode) &&
               IsPatchedDebugBreakSlotSequence())) &&
              isolate->debug()->has_break_points()) {
     visitor->VisitDebugTarget(this);
-#endif
   } else if (RelocInfo::IsRuntimeEntry(mode)) {
     visitor->VisitRuntimeEntry(this);
   }
@@ -513,14 +507,12 @@ void RelocInfo::Visit(Heap* heap) {
     CPU::FlushICache(pc_, sizeof(Address));
   } else if (RelocInfo::IsCodeAgeSequence(mode)) {
     StaticVisitor::VisitCodeAgeSequence(heap, this);
-#ifdef ENABLE_DEBUGGER_SUPPORT
   } else if (heap->isolate()->debug()->has_break_points() &&
              ((RelocInfo::IsJSReturn(mode) &&
               IsPatchedReturnSequence()) ||
              (RelocInfo::IsDebugBreakSlot(mode) &&
               IsPatchedDebugBreakSlotSequence()))) {
     StaticVisitor::VisitDebugTarget(heap, this);
-#endif
   } else if (RelocInfo::IsRuntimeEntry(mode)) {
     StaticVisitor::VisitRuntimeEntry(this);
   }