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Send data use updates per resource from renderer to browser. This
will allow the browser process to aggregate per-resource information
and will keep feature specific logic out of core PageLoadMetrics
code.

Bug: 873746,851543
Cq-Include-Trybots: luci.chromium.try:linux_mojo
Change-Id: I34a617c8f1212d9d9ec157de16d65379340b1697
Reviewed-on: https://chromium-review.googlesource.com/1164222
Commit-Queue: John Delaney <johnidel@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Reviewed-by: Josh Karlin <jkarlin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583691}