Make scrolling tough ad cases wait for the page to be interactive
Make scrolling tough ad cases wait for the page to be interactive

Make scrolling tough ad cases wait for the page to be interactive

BUG=510398

Review URL: https://codereview.chromium.org/1305793003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#345836}

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