Some header files were removed from the source but the change was not
reflected to v8.gyp.

Bug: v8:6600
Change-Id: I9f952835ea9de36bbc889efb50d63482c10f893f
Reviewed-on: https://chromium-review.googlesource.com/877879Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50739}