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

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index 12200740a0becb3ff604b6622be73f73226badfc..21be464304da2a289838b2a5cf954abe1ba0cf8a 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -729,6 +729,9 @@ class ExternalReference BASE_EMBEDDED {
 
   static ExternalReference get_make_code_young_function(Isolate* isolate);
 
+  // New heap objects tracking support.
+  static ExternalReference record_object_allocation_function(Isolate* isolate);
+
   // Deoptimization support.
   static ExternalReference new_deoptimizer_function(Isolate* isolate);
   static ExternalReference compute_output_frames_function(Isolate* isolate);