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wangxianzhu authored
Remove eager invalidation of scrollbars except when they are removed. Invalidate scrollbars during paint invalidation so that we can calculate paint invalidation rects for them. The rects are required by PaintController to calculate display item bounds. BUG=529938 Review URL: https://codereview.chromium.org/1406133005 Cr-Commit-Position: refs/heads/master@{#360144}
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