The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f702287651bbcddad6f6f657696705dfcddb384a

commit f702287651bbcddad6f6f657696705dfcddb384a
Author: jyquinn <jyquinn@chromium.org>
Date: Tue Dec 20 22:58:12 2016

Remove WebUI favicon support on iOS

Favicon support for WebUI on iOS was only needed for the history page.
Now that history is native on iOS, it is no longer needed. Removing
this dead code.

BUG= 674996 

Review-Url: https://codereview.chromium.org/2583963002
Cr-Commit-Position: refs/heads/master@{#439904}

[modify] https://crrev.com/f702287651bbcddad6f6f657696705dfcddb384a/ios/web/BUILD.gn
[modify] https://crrev.com/f702287651bbcddad6f6f657696705dfcddb384a/ios/web/webui/crw_web_ui_manager.mm
[modify] https://crrev.com/f702287651bbcddad6f6f657696705dfcddb384a/ios/web/webui/crw_web_ui_manager_unittest.mm
[modify] https://crrev.com/f702287651bbcddad6f6f657696705dfcddb384a/ios/web/webui/resources/web_ui_bundle.js
[delete] https://crrev.com/6a66b7eda01fb58b0393ecd4f8086ebab0f25e5a/ios/web/webui/resources/web_ui_favicons.js