Reload: deprecate consecutive reload duration time metrics

Deprecate metrics that were introduced to monitor reload duration times
to investigate a chance to detect a signal for users' reload intention.
But, we could not figure out good characteristics to utilize this
information.

This change effectively reverts the following CL, but the reload_type_
in NavigationHandleImpl will be remained because it's now used for
another purpose.

https://codereview.chromium.org/2174293002

Bug: 975314
Change-Id: Idda509df284247c42687a69a2a654607e921b788
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1670142
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Charlie Reis <creis@chromium.org>
Auto-Submit: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672066}
4 files changed