All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=632637

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICghom0uQkM


Bot(s) for this bug's original alert(s):

chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005813513306098320

===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : Turn on enable begin frame scheduling by default
Author  : enne
Commit description:
  
This turns on --enable-begin-frame-scheduling for all platforms but mus
and Blimp.  This change means browser->renderer begin frame ticks
instead of sending vsync information and having a synthetic source on
the renderer side.  This feature was already on for Android so should
only be a real change for desktop / ChromeOS platforms.

Lots of cleanup can follow from this like removing all commit vsync /
authoritative vsync / CompositorVSyncManager things, but this is a
smaller patch to suss out any performance regressions.

This previously landed and regressed a number of metrics.  Some of these
have been investigated and fixed and the rest are WontFix.

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/1939253002
Cr-Commit-Position: refs/heads/master@{#408172}
Commit  : d020d554c9ffc0476d43f5364a47c522b64e3d9a
Date    : Wed Jul 27 17:45:34 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev   N  Good?
chromium@408142  18.9224  0.279496  5  good
chromium@408159  19.031   0.110345  5  good
chromium@408169  19.0095  0.173305  5  good
chromium@408171  19.1494  0.189826  5  good
chromium@408172  24.8994  0.336948  5  bad    <--
chromium@408174  24.9534  0.4359    5  bad
chromium@408178  24.9709  0.137687  5  bad

Bisect job ran on: win_x64_perf_bisect
Bug ID: 632637

Test Command: .\src\out\Release_x64\performance_browser_tests.exe --test-launcher-print-test-stdio=always --enable-gpu
Test Metric: TabCapturePerformance/CaptureSucceeded
Relative Change: 31.96%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/win_x64_perf_bisect/builds/1358
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9005813513306098320


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5788738546827264

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|  X  | for more information addressing perf regression bugs. For feedback,
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