First implementation of allocation elimination in Hydrogen.

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index c5a1fddb88b413c843f7ca051a421026b035537c..7ed604b17fb3ae37996dcd7e827afe48a74b2a8d 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -1031,6 +1031,15 @@ Handle<JSObject> Factory::NewJSObjectFromMap(Handle<Map> map,
 }
 
 
+Handle<JSObject> Factory::NewJSObjectFromMapForDeoptimizer(
+    Handle<Map> map, PretenureFlag pretenure) {
+  CALL_HEAP_FUNCTION(
+      isolate(),
+      isolate()->heap()->AllocateJSObjectFromMapForDeoptimizer(*map, pretenure),
+      JSObject);
+}
+
+
 Handle<JSArray> Factory::NewJSArray(int capacity,
                                     ElementsKind elements_kind,
                                     PretenureFlag pretenure) {