setContentInsetFast: was added to improve fullscreen performance for UIWebView and currently used only for Pull To Action, where performance seems to be ok even with regular |setContentInset:| call.
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/04c2777134dd67f93da8d059c973521e18e8e55b commit 04c2777134dd67f93da8d059c973521e18e8e55b Author: justincohen <justincohen@chromium.org> Date: Wed Dec 21 20:16:59 2016 Revert 'Bypass UIWebView.scrollView's contentInset implementation with UIScrollView's. We had already stopped using this in full screen controller when we moved to WKWebView, but pull-to-action and some cruft remained. BUG= 675746 Review-Url: https://codereview.chromium.org/2594793004 Cr-Commit-Position: refs/heads/master@{#440198} [modify] https://crrev.com/04c2777134dd67f93da8d059c973521e18e8e55b/ios/chrome/browser/ui/browser_view_controller.mm [modify] https://crrev.com/04c2777134dd67f93da8d059c973521e18e8e55b/ios/chrome/browser/ui/fullscreen_controller.h [modify] https://crrev.com/04c2777134dd67f93da8d059c973521e18e8e55b/ios/chrome/browser/ui/fullscreen_controller.mm [modify] https://crrev.com/04c2777134dd67f93da8d059c973521e18e8e55b/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.mm [modify] https://crrev.com/04c2777134dd67f93da8d059c973521e18e8e55b/ios/web/public/web_state/crw_web_view_scroll_view_proxy.h [modify] https://crrev.com/04c2777134dd67f93da8d059c973521e18e8e55b/ios/web/web_state/crw_web_view_scroll_view_proxy.mm
Comment 1 by eugene...@chromium.org
, Dec 19 2016