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This is basically the same as
https://chromium-review.googlesource.com/c/chromium/src/+/1552877 but
for chromecast/renderer.

Uses Context version of Object::Set and calls Check on the result in
cases where it cannot fail and CreateDataProperty for setting values in
Arrays to avoid potential modifications by user-scripts to the Array
prototype.

Bug: v8:7283
Change-Id: I0a66ed2205526ef30ce4357b0670cae67589aeb1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1583893
Auto-Submit: Dan Elphick <delphick@chromium.org>
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654377}