Deprecate FACTORY helper macro.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index d4938e5c3848d9509b7d0603ae19c2cf253a4373..84a4767c2ea5bd2af0293c4bbbeb83f6c92e79ef 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -3226,7 +3226,8 @@ HInstruction* HStringAdd::New(
     HConstant* c_right = HConstant::cast(right);
     HConstant* c_left = HConstant::cast(left);
     if (c_left->HasStringValue() && c_right->HasStringValue()) {
-      return new(zone) HConstant(FACTORY->NewConsString(c_left->StringValue(),
+      Factory* factory = Isolate::Current()->factory();
+      return new(zone) HConstant(factory->NewConsString(c_left->StringValue(),
                                                         c_right->StringValue()),
                                  Representation::Tagged());
     }