Revert "VM: Array bounds checks that don't deoptimize for precompiled code."

runtime/vm/aot_optimizer.cc

Index: runtime/vm/aot_optimizer.cc
diff --git a/runtime/vm/aot_optimizer.cc b/runtime/vm/aot_optimizer.cc
index 97b51f8f13896dd26dcae26fcf22e997450fe6ac..a193dcfc0ef72a6939864661bab421e2d471ce60 100644
--- a/runtime/vm/aot_optimizer.cc
+++ b/runtime/vm/aot_optimizer.cc
@@ -2743,26 +2743,4 @@ bool AotOptimizer::TryInlineInstanceSetter(InstanceCallInstr* instr,
 }
 
 
-void AotOptimizer::ReplaceArrayBoundChecks() {
-  for (BlockIterator block_it = flow_graph_->reverse_postorder_iterator();
-       !block_it.Done();
-       block_it.Advance()) {
-    ForwardInstructionIterator it(block_it.Current());
-    current_iterator_ = ⁢
-    for (; !it.Done(); it.Advance()) {
-      CheckArrayBoundInstr* check = it.Current()->AsCheckArrayBound();
-      if (check != NULL) {
-        GenericCheckBoundInstr* new_check = new(Z) GenericCheckBoundInstr(
-            new(Z) Value(check->length()->definition()),
-            new(Z) Value(check->index()->definition()),
-            check->deopt_id());
-        flow_graph_->InsertBefore(check, new_check,
-                                  check->env(), FlowGraph::kEffect);
-        current_iterator()->RemoveCurrentFromGraph();
-      }
-    }
-  }
-}
-
-
 }  // namespace dart