angler-fishThe Vulnerability History Project

Sanitize inheritance in callers of utils.expose

      - Let all private classes inherit from the null prototype.
- Use safe built-ins.
- Minor drive-by fixes (code style).

BUG=603748,591164

Review-Url: https://codereview.chromium.org/1915753002
Cr-Commit-Position: refs/heads/master@{#390510}
    
commit 931719c51866a7c2e272114517cc52aa6581adff
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+22 -38
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