The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/24b30bfd5ac15c60a29477638c91ab0fb8159055

commit 24b30bfd5ac15c60a29477638c91ab0fb8159055
Author: sahel <sahel@chromium.org>
Date: Tue Jan 24 00:05:32 2017

UMA metrics for fractions of wheel and touch scrolls blocked on the main thread.

BUG= 626662 ,  626663 
TEST=InputHandlerProxyTest.GestureScrollingThreadStatusHistograms,
     InputHandlerProxyTest.WheelScrollingThreadStatusHistograms

Review-Url: https://codereview.chromium.org/2636583002
Cr-Commit-Position: refs/heads/master@{#445551}

[modify] https://crrev.com/24b30bfd5ac15c60a29477638c91ab0fb8159055/tools/metrics/histograms/histograms.xml
[modify] https://crrev.com/24b30bfd5ac15c60a29477638c91ab0fb8159055/ui/events/blink/input_handler_proxy.cc
[modify] https://crrev.com/24b30bfd5ac15c60a29477638c91ab0fb8159055/ui/events/blink/input_handler_proxy.h
[modify] https://crrev.com/24b30bfd5ac15c60a29477638c91ab0fb8159055/ui/events/blink/input_handler_proxy_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9f4f936297a58457a6726d361bcb013e45ade2a2

commit 9f4f936297a58457a6726d361bcb013e45ade2a2
Author: dbeam <dbeam@chromium.org>
Date: Tue Jan 24 06:34:12 2017

Revert "UMA metrics for fractions of wheel and touch scrolls blocked on the main thread."

This reverts commit 24b30bfd5ac15c60a29477638c91ab0fb8159055.

Broke events_unittests on Linux Tests (dbg)(1)(32):
https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests%20(dbg)(1)(32)

With a problem of:

AnimateInput/InputHandlerProxyTest.GestureScrollingThreadStatusHistograms/0 (run #1):
[ RUN      ] AnimateInput/InputHandlerProxyTest.GestureScrollingThreadStatusHistograms/0
[6128:6128:0123/172239.190828:1350397596:FATAL:input_handler_proxy.cc(797)] Check failed: !expect_scroll_update_end_.

TBR=sahel@chromium.org,dtapuska@chromium.org,tdresser@chromium.org,holte@chromium.org
BUG= 626662 , 626663 
NOTRY=true
NOTREECHECKS=true

Review-Url: https://codereview.chromium.org/2650943004
Cr-Commit-Position: refs/heads/master@{#445666}

[modify] https://crrev.com/9f4f936297a58457a6726d361bcb013e45ade2a2/tools/metrics/histograms/histograms.xml
[modify] https://crrev.com/9f4f936297a58457a6726d361bcb013e45ade2a2/ui/events/blink/input_handler_proxy.cc
[modify] https://crrev.com/9f4f936297a58457a6726d361bcb013e45ade2a2/ui/events/blink/input_handler_proxy.h
[modify] https://crrev.com/9f4f936297a58457a6726d361bcb013e45ade2a2/ui/events/blink/input_handler_proxy_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b4ff2064283bc966a9de8b8c391dc8a3b168233d

commit b4ff2064283bc966a9de8b8c391dc8a3b168233d
Author: sahel <sahel@chromium.org>
Date: Tue Jan 24 21:38:55 2017

Re-landing "UMA metrics for fractions of wheel and touch scrolls blocked on the main thread."

The original review-URL is https://codereview.chromium.org/2636583002
It got reverted because unittests were failing in Linux_Tests (dbg).

I changed the tests to call ScrollEnd before calling ScrollBegin
for the second time.

TBR=holte@chromium.org
BUG= 626662 ,  626663 
TEST=InputHandlerProxyTest.GestureScrollingThreadStatusHistogram,
     InputHandlerProxyTest.WheelScrollingThreadStatusHistogram

Review-Url: https://codereview.chromium.org/2651883007
Cr-Commit-Position: refs/heads/master@{#445826}

[modify] https://crrev.com/b4ff2064283bc966a9de8b8c391dc8a3b168233d/tools/metrics/histograms/histograms.xml
[modify] https://crrev.com/b4ff2064283bc966a9de8b8c391dc8a3b168233d/ui/events/blink/input_handler_proxy.cc
[modify] https://crrev.com/b4ff2064283bc966a9de8b8c391dc8a3b168233d/ui/events/blink/input_handler_proxy.h
[modify] https://crrev.com/b4ff2064283bc966a9de8b8c391dc8a3b168233d/ui/events/blink/input_handler_proxy_unittest.cc