Allow optimistically hoisting elements transitions over accesses.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index dfffe41fca745672ace8ec5ec05774e91de132ed..e7dc81a803135d676f74172eafa5476fa1811b7f 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -4661,10 +4661,6 @@ class HTransitionElementsKind: public HTemplateInstruction<1> {
         transitioned_map_(transitioned_map) {
     SetOperandAt(0, object);
     SetFlag(kUseGVN);
-    // Don't set GVN DependOn flags here. That would defeat GVN's detection of
-    // congruent HTransitionElementsKind instructions. Instruction hoisting
-    // handles HTransitionElementsKind instruction specially, explicitly adding
-    // DependsOn flags during its dependency calculations.
     SetGVNFlag(kChangesElementsKind);
     if (original_map->has_fast_double_elements()) {
       SetGVNFlag(kChangesElementsPointer);