Track JS allocations as they arrive with no affection on performance when tracking is switched off

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 3d5a4560bb0227789e7092031bb0a35e12588b7e..931a4eb12fac3baf70b1ff86f5311174832991b3 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -1115,6 +1115,15 @@ class MacroAssembler: public Assembler {
                 Label* gc_required,
                 AllocationFlags flags);
 
+  // Record a JS object allocation if allocations tracking mode is on.
+  void RecordObjectAllocation(Isolate* isolate,
+                              Register object,
+                              Register object_size);
+
+  void RecordObjectAllocation(Isolate* isolate,
+                              Register object,
+                              int object_size);
+
   // Undo allocation in new space. The object passed and objects allocated after
   // it will no longer be allocated. Make sure that no pointers are left to the
   // object(s) no longer allocated as they would be invalid when allocation is