Revert "Disable allocation folding when allocations tracking is on"

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index b6cdd05c08cabc751d538092505cb9f9664c160c..6da6774aa8e87302bdd2a03a9f4f31f88d8216e7 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -3308,10 +3308,7 @@ void HAllocate::HandleSideEffectDominator(GVNFlag side_effect,
                                           HValue* dominator) {
   ASSERT(side_effect == kChangesNewSpacePromotion);
   Zone* zone = block()->zone();
-  if (!FLAG_use_allocation_folding ||
-      isolate()->heap_profiler()->is_tracking_allocations()) {
-    return;
-  }
+  if (!FLAG_use_allocation_folding) return;
 
   // Try to fold allocations together with their dominating allocations.
   if (!dominator->IsAllocate()) {