Use shorter max length for tooltip text on Windows
Use shorter max length for tooltip text on Windows

1024 is the original value (see https://codereview.chromium.org/924433002, and https://codereview.chromium.org/197031)

BUG=513693
R=sky@chromium.org

Review URL: https://codereview.chromium.org/1431493002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#357002}

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