Issue 638938  has been merged into this issue.

From merged  issue 638938 : Text selecting is also broken.

Steps to reproduce the problem:
1. Open any web page (ideally one that can already scroll)
2. Attempt to scroll past the top of the page
3. Try selecting text or clicking on page elements

What is the expected behavior?
Scrolling should stop at the top of the page, and the scrollbar should stop moving. (On Mac, it should "bounce".)

When interacting with page elements, clicking should interact with elements directly beneath the mouse.

What went wrong?
Scrolling does not bounce at the top of the page, the page jitters, and the scrollbar keeps shrinking.

When interacting with page elements, clicking and dragging happens at a position offset from the mouse, as if the page had kept scrolling.

Did this work before? Yes Yesterday, which was probably Chrome 53

Chrome version: 54.0.2832.0  Channel: canary
OS Version: OS X 10.11.5
Flash Version: Shockwave Flash 23.0 r0

See video of the issue at https://youtu.be/jodkyeWOmNY

I was unable to repro on Windows.

 Issue 639048  has been merged into this issue.

This is the regression range:

https://chromium.googlesource.com/chromium/src/+log/7f781f34f09fe2f3c5117f71de47e38d9bb59bad..806556451c84f03082ece3818862bbc22fd2727b

May be this is the reason for the regression: https://codereview.chromium.org/2183403002

khushalsagar@: Can you please check if your patch is the culprit?

Thanks in advance.

Sure, I'll take a look. My change did touch a lot of code there.

Fix up for review, https://codereview.chromium.org/2259083002/

 Issue 639187  has been merged into this issue.

 Issue 639369  has been merged into this issue.

Patch in CQ.

 Issue 639338  has been merged into this issue.

 Issue 639283  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f70f776fa8c14b5d684e39a85766dbef3f6e002a

commit f70f776fa8c14b5d684e39a85766dbef3f6e002a
Author: khushalsagar <khushalsagar@chromium.org>
Date: Fri Aug 19 22:45:29 2016

cc: Correct elastic overscroll synchronization.

The |elastic_overscroll_| was moved to LayerTree in this change
(https://codereview.chromium.org/2183403002), and is being used for
synchronization during commit, but it wasn't deleted from LayerTreeHost
and was incorrectly used when building PropertyTrees and applying the
delta during BeginMainFrame.

BUG= 639046 
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Review-Url: https://codereview.chromium.org/2259083002
Cr-Commit-Position: refs/heads/master@{#413272}

[modify] https://crrev.com/f70f776fa8c14b5d684e39a85766dbef3f6e002a/cc/proto/layer_tree.proto
[modify] https://crrev.com/f70f776fa8c14b5d684e39a85766dbef3f6e002a/cc/proto/layer_tree_host.proto
[modify] https://crrev.com/f70f776fa8c14b5d684e39a85766dbef3f6e002a/cc/trees/layer_tree.cc
[modify] https://crrev.com/f70f776fa8c14b5d684e39a85766dbef3f6e002a/cc/trees/layer_tree_host.cc
[modify] https://crrev.com/f70f776fa8c14b5d684e39a85766dbef3f6e002a/cc/trees/layer_tree_host.h
[modify] https://crrev.com/f70f776fa8c14b5d684e39a85766dbef3f6e002a/cc/trees/layer_tree_host_unittest_serialization.cc

I just updated my Canary, but looks like this fix was not shipped yet... right? Because if it did, the issue is still happening for me... If I scroll down until the end of the page, the issue happens...

This landed a couple of hours ago. Wouldn't be in the canary yet.

 Issue 639501  has been merged into this issue.

I've manually verified that google.com appears to work correctly after scrolling with the CL in c#13. This should be fixed in the next canary.

 Issue 639548  has been merged into this issue.

 Issue 639548  has been merged into this issue.

Thanks guys... apparently every thing is back to normal... I still can not reproduce the issue after the new update this morning... I'll keep you guys posted if something else related to this happens... Thanks again...

This item seems fixed for me as well (although there is a new unrelated bug which I will post in proper section if not posted already).

Thanks for your efforts!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e978686794916d58369484725af4a0b937bf5338

commit e978686794916d58369484725af4a0b937bf5338
Author: khushalsagar <khushalsagar@chromium.org>
Date: Tue Aug 23 04:50:24 2016

cc: Add a test for the elastic overscroll synchronization.

During each BeginMainFrame, we send the delta for the elastic overcroll
to the main thread. This value is never mutated on the main thread, and
is updated only from the impl thread. Add a test to verify this
expectation and also ensure that the callbacks to the InputHandlerClient
necessary for elastic overscroll synchronization are made.

BUG= 639046 
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Review-Url: https://codereview.chromium.org/2261383002
Cr-Commit-Position: refs/heads/master@{#413667}

[modify] https://crrev.com/e978686794916d58369484725af4a0b937bf5338/cc/test/layer_tree_test.cc
[modify] https://crrev.com/e978686794916d58369484725af4a0b937bf5338/cc/test/test_hooks.h
[modify] https://crrev.com/e978686794916d58369484725af4a0b937bf5338/cc/trees/layer_tree_host.h
[modify] https://crrev.com/e978686794916d58369484725af4a0b937bf5338/cc/trees/layer_tree_host_unittest_scroll.cc

Rechecked this on chrome version 54.0.2837.0 on MAC 10.11.6 Retina Pro and fix is working as intended. Scrolling stops at the top / bottom of the page, and the scrollbar does not move. It just bounces.

Selecting text also works fine after clicking while scrolling. 

Adding TE-verified labels.