Pri-0 bugs are critical regressions or serious emergencies, and this bug has not been updated in three days. Could you please provide an update, or adjust the priority to a more appropriate level if applicable?

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This doesn't seem as important as other bugs; dropping to P2 unless you object

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/61e985a59f1261d7db71f68fea12a2a4e812a38f

commit 61e985a59f1261d7db71f68fea12a2a4e812a38f
Author: edchin <edchin@chromium.org>
Date: Tue Jun 26 17:23:48 2018

[ios] Disable the page control when dragging

Scrolling and tapping on the page control makes the scroll very
erratic. This CL disables the page control when dragging the scroll.

Bug:  826047 
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: Ifca03ea1936c1a90150f1ffadf301eac8ee0791d
Reviewed-on: https://chromium-review.googlesource.com/1114328
Commit-Queue: edchin <edchin@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570442}
[modify] https://crrev.com/61e985a59f1261d7db71f68fea12a2a4e812a38f/ios/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm