Serialize all profiles from browser process to save memory

Bug: 888716, 851163
Change-Id: I4ac176bf42d716f163717022352793dee763399a
Reviewed-on: https://chromium-review.googlesource.com/c/1327704
Commit-Queue: Xi Cheng <chengx@chromium.org>
Reviewed-by: Mike Wittman <wittman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606962}
2 files changed