Remove base::ListValue::Set(size_t, base::Value*)

This change removes the raw pointer version of base::ListValue::Set,
replacing it with the unique_ptr version or base::ListValue::Append*
where appropriate.

BUG=646113

Review-Url: https://codereview.chromium.org/2838893002
Cr-Commit-Position: refs/heads/master@{#467340}
20 files changed