Replace ICStub for array.length with hydrogen stub

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index e30b350df3169ec7f58eaeddbcf266efd689d521..2bed223609a804ff6ce6658c30847de411b94e00 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -13027,6 +13027,16 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_Abort) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_UnexpectedDeopt) {
+  ASSERT(args.length() == 0);
+  OS::PrintError("Unexpected deoptimization");
+  isolate->PrintStack();
+  OS::Abort();
+  UNREACHABLE();
+  return NULL;
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_FlattenString) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);