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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/89d79c17e65fe9903c903ac88cad65e581430c65

commit 89d79c17e65fe9903c903ac88cad65e581430c65
Author: Mark Cogan <marq@google.com>
Date: Tue Apr 17 11:12:08 2018

[iOS] Remove obsolete constraint and RTL utilities.

This CL removes the obsolete-after-iOS8 LayoutOptionForRTLSupport() utility method.

Since that was the major use case for many of the "option" variants of AddConstraint methods,
they were converted to the fewer-parameter version, and other obsolete variants were also
cleaned up.

Bug:  637247 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I961204c1620d354b2c3c3461baa65a8d903e8c5b
Reviewed-on: https://chromium-review.googlesource.com/1013569
Commit-Queue: Mark Cogan <marq@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551293}
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/alert_coordinator/loading_alert_coordinator.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/ntp/incognito_view.mm
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[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/ntp/recent_tabs/views/panel_bar_view.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.mm
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[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_in_progress_view.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_off_view.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_on_no_sessions_view.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/ntp/recent_tabs/views/spacers_view.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/rtl_geometry.h
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[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/tabs/tab_view.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/tools_menu/tools_menu_view_controller.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/tools_menu/tools_menu_view_tools_cell.mm
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/util/constraints_ui_util.h
[modify] https://crrev.com/89d79c17e65fe9903c903ac88cad65e581430c65/ios/chrome/browser/ui/util/constraints_ui_util.mm