GitLab

Allows specifying cache temperature with --cache-temperature.
Values are as defined in telemetry/page/cache_temperature.py.
For example: --cache-temperature=warm.

Also, changes the default cache temperature for loading_ct to
COLD.

Change-Id: Ib0210bf2a72d28902bfe653cc01646aae4ccbcff
Reviewed-on: https://chromium-review.googlesource.com/1106643
Commit-Queue: Deepanjan Roy <dproy@chromium.org>
Reviewed-by: Ravi Mistry <rmistry@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569260}