Add a skeleton WebUI for saving memory profiles.

This is only populated with dummy data for now, but provides a place
to hook up the process list and dumping function in the future.

Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I24934d3052dd8e36ad4a7b1372a5ef557ce716d4
Reviewed-on: https://chromium-review.googlesource.com/578559
Commit-Queue: Brett Wilson <[email protected]>
Reviewed-by: Albert J. Wong <[email protected]>
Cr-Commit-Position: refs/heads/master@{#488401}
10 files changed