The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3c6103ecd1514030cac0f094b10924daef23c41f

commit 3c6103ecd1514030cac0f094b10924daef23c41f
Author: Kurt Horimoto <kkhorimoto@chromium.org>
Date: Sat Feb 10 01:08:09 2018

[iOS] Remove FindInPageControllerDelegate.

This is no longer necessary, as the new fullscreen implementation
already ignored scrolls originating from fullscreen.

Bug:  810896 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I6da22780ef46f5866e698e967e6b3c62e4b2148c
Reviewed-on: https://chromium-review.googlesource.com/912428
Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#535907}
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/find_in_page/find_in_page_controller.h
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/find_in_page/find_in_page_controller.mm
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/find_in_page/find_tab_helper.h
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/find_in_page/find_tab_helper.mm
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/find_in_page/find_tab_helper_unittest.mm
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/tabs/tab.h
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/tabs/tab.mm
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/tabs/tab_helper_util.mm
[modify] https://crrev.com/3c6103ecd1514030cac0f094b10924daef23c41f/ios/chrome/browser/ui/browser_list/browser_web_state_list_delegate.mm