- introduced ValueMirror interface, this interface contains methods to generate
  different protocol entities,
- introduced DebugPropertyIterator, this iterator iterates through object properties
  in the following order: exotic indices, enumerable strings, all other properties,
- removed all injected script infra, e.g. closure compiler,

R=dgozman@chromium.org
TBR=yangguo@chromium.org

Bug: chromium:595206
Change-Id: Idcfc04489ee52e015ad1d1d191c3474cc65e63f2
Reviewed-on: https://chromium-review.googlesource.com/c/1308353Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57150}