The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b2f9da1122b900f97b281d17a42084ffe15765c2

commit b2f9da1122b900f97b281d17a42084ffe15765c2
Author: Matthew Jones <mdjones@chromium.org>
Date: Mon Aug 21 22:39:06 2017

Cleanup progress bar animation experiment

This change makes the smooth-indeterminate animation the default
behavior of the progress bar as it is now launched to 100% on stable.
The experiment and flags have been removed and the logic in
ToolbarProgressBar has been simplified.

BUG= 754745 

Change-Id: I87f25c927783aed946d40b04e021d44412faab60
Reviewed-on: https://chromium-review.googlesource.com/624525
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Yusuf Ozuysal <yusufo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496095}
[modify] https://crrev.com/b2f9da1122b900f97b281d17a42084ffe15765c2/chrome/android/java/src/org/chromium/chrome/browser/widget/ToolbarProgressBar.java
[modify] https://crrev.com/b2f9da1122b900f97b281d17a42084ffe15765c2/chrome/browser/about_flags.cc
[modify] https://crrev.com/b2f9da1122b900f97b281d17a42084ffe15765c2/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/b2f9da1122b900f97b281d17a42084ffe15765c2/chrome/browser/flag_descriptions.h