Implement LookupIterator designed to replace LookupResult

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # TODO(jochen): These will need to be user-settable to support standalone V8
 # builds.
 v8_compress_startup_data = "off"
 v8_deprecation_warnings = false
 v8_enable_disassembler = false
 v8_enable_gdbjit = false
@@ skipping 556 matching lines @@
     "src/lithium-codegen.h",
     "src/lithium.cc",
     "src/lithium.h",
     "src/liveedit.cc",
     "src/liveedit.h",
     "src/log-inl.h",
     "src/log-utils.cc",
     "src/log-utils.h",
     "src/log.cc",
     "src/log.h",
+    "src/lookup.cc",
+    "src/lookup.h",
     "src/macro-assembler.h",
     "src/mark-compact.cc",
     "src/mark-compact.h",
     "src/messages.cc",
     "src/messages.h",
     "src/msan.h",
     "src/natives.h",
     "src/objects-debug.cc",
     "src/objects-inl.h",
     "src/objects-printer.cc",
@@ skipping 466 matching lines @@
     deps = [
       ":v8_base",
       ":v8_nosnapshot",
     ]
   }
 
   direct_dependent_configs = [ ":external_config" ]
 }
 
 }