ash: Prefetch files for login This CL adds a feature "ReadaheadForLogin". If the feature is enabled, files in the predefined set are prefetched when the login screen is displayed. Currently following files are preloaded: - /opt/google/chrome/chrome - /opt/google/chrome/resources.pak - /opt/google/chrome/chrome_100_percent.pak - /opt/google/chrome/chrome_200_percent.pak - /usr/share/fonts/noto/NotoSans-Regular.ttf - /usr/share/fonts/roboto/Roboto-Medium.ttf - /usr/share/fonts/roboto/Roboto-Regular.ttf Bug: b:374887218 Change-Id: Id7ba19a9c657d7f2cf51c482c86e5bb8643e5da6 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6012264 Reviewed-by: Xiyuan Xia <xiyuan@chromium.org> Commit-Queue: Jun Ishiguro <junis@google.com> Reviewed-by: Hidehiko Abe <hidehiko@chromium.org> Reviewed-by: Achuith Bhandarkar <achuith@chromium.org> Cr-Commit-Position: refs/heads/main@{#1384175}
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