Do not sample memory histograms in short idle notifications.
Do not sample memory histograms in short idle notifications.

BUG=chromium:485472
LOG=NO
TBR=jochen@chromium.org

Review URL: https://codereview.chromium.org/1128363003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#28297}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh