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This moves TabCapturePerformanceTest and CastV2PerformanceTest into
browser_tests. By default, they have been changed to run in a quick-
check mode. When run for performance testing on the perf bots, the
additional --full-performance-run command line switch will be required.

The performance_browser_tests isolate config has been changed to run
browser_tests with the --full-performance-run switch, gtest filters,
and timeout overrides. Also, the old performance_browser_tests GN test
target has been turned into a simple group target that groups the
necessary data dependencies for running on the perf bots.

This change also includes some changes to allow the tests to complete
in the absence of tracing data when in quick-check mode. While most
bots do collect a reasonable amount of tracing data in a few short
seconds, one or two don't always do so. Unfortunately, we can't justify
making the CQ run longer to force data collection in all cases.

Bug: 804191
Change-Id: I2de6c0b94453981fb0d9015f6b3f0e42f57cc2a6
Reviewed-on: https://chromium-review.googlesource.com/c/1428399
Commit-Queue: Yuri Wiitala <miu@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632366}