DevTools: Optimize Promises pane during stress tests.
DevTools: Optimize Promises pane during stress tests.

Some optimizations to perform better in stress tests.

This will still work poorly with huge amount of data, as it needs a viewport Datagrid.

BUG=348919
R=dgozman, eustas

Review URL: https://codereview.chromium.org/914153002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@189995 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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