The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/16cddbea1a32052045101a2f1858114368125066

commit 16cddbea1a32052045101a2f1858114368125066
Author: Yuwei Huang <yuweih@chromium.org>
Date: Tue Mar 27 00:47:04 2018

[Remoting Mobile] Allow protocol::PerfTracker's rate accessors to be const methods

Currently we need to pass a raw pointer of PerfTracker to ClientTelemetryLogger
because its rate accessors are not const, that's because RateCounter::Rate()
evicts obsolete data points. Given that evicting obsolete data points doesn't
quite change the stats result, we can simply const_cast the eviction logic.

This CL also changes the VLOG level of the perf stats to 0 to allow them to be
printed to the console.

Bug:  825313 
Change-Id: Idf8a9c5dd5190566b75a4b60720cd605be774329
Reviewed-on: https://chromium-review.googlesource.com/978662
Commit-Queue: Yuwei Huang <yuweih@chromium.org>
Reviewed-by: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#545910}
[modify] https://crrev.com/16cddbea1a32052045101a2f1858114368125066/remoting/base/rate_counter.cc
[modify] https://crrev.com/16cddbea1a32052045101a2f1858114368125066/remoting/base/rate_counter.h
[modify] https://crrev.com/16cddbea1a32052045101a2f1858114368125066/remoting/client/chromoting_session.cc
[modify] https://crrev.com/16cddbea1a32052045101a2f1858114368125066/remoting/client/client_telemetry_logger.cc
[modify] https://crrev.com/16cddbea1a32052045101a2f1858114368125066/remoting/client/client_telemetry_logger.h
[modify] https://crrev.com/16cddbea1a32052045101a2f1858114368125066/remoting/client/client_telemetry_logger_unittest.cc
[modify] https://crrev.com/16cddbea1a32052045101a2f1858114368125066/remoting/protocol/performance_tracker.h