This appears to be the result of ValueAnimator and TimeAnimator sending an initial huge value for deltaTime on JellyBean. Newer platforms send 0 for the first update.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2f8f44e6740bda7e9015e252db16cc869721e3a8

commit 2f8f44e6740bda7e9015e252db16cc869721e3a8
Author: mdjones <mdjones@chromium.org>
Date: Thu May 12 00:14:15 2016

Fix smooth progress behavior on JellyBean

The animators in JellyBean send a delta time fom the last time an
animation played instead of 0 for the first frame after an animation
starts. A combination of this and a misplaced "max" function
completely derailed the smooth progress bar animation.

This change also addresses a crash that only occures on JellyBean
that involves early cancellation of a running animation. After the
animation is canceled, the animator tries to run doAnimationFrame
with an empty list of updates. The animation is now allowed to run
itself out. (This should have no visible affect on the animation
since it becomes transparent near completion).

BUG= 611125 , 610522

Review-Url: https://codereview.chromium.org/1966943004
Cr-Commit-Position: refs/heads/master@{#393113}

[modify] https://crrev.com/2f8f44e6740bda7e9015e252db16cc869721e3a8/chrome/android/java/src/org/chromium/chrome/browser/widget/ToolbarProgressBar.java
[modify] https://crrev.com/2f8f44e6740bda7e9015e252db16cc869721e3a8/chrome/android/java/src/org/chromium/chrome/browser/widget/ToolbarProgressBarAnimatingView.java

Not able to repro with latest build.