See attached screenshot for timeline - after 3.5s, there's a flood of favicon requests, and it delays display roughly until the 7s mark. (The other outliers are favicons that generate server error responses, but they don't seem to affect time to display)

Deleted: Screen Shot 2016-04-25 at 1.50.47 PM.png 9.7 KB

	Screen Shot 2016-04-25 at 1.50.47 PM.png 9.7 KB View Download

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e34687cdc6fed5fd7d1eede2fb6a0aed5f26d466

commit e34687cdc6fed5fd7d1eede2fb6a0aed5f26d466
Author: dpapad <dpapad@chromium.org>
Date: Wed Apr 27 18:51:45 2016

Make getFaviconImageSet work with all expected URL types.

BUG= 606445 

Review-Url: https://codereview.chromium.org/1914073005
Cr-Commit-Position: refs/heads/master@{#390137}

[modify] https://crrev.com/e34687cdc6fed5fd7d1eede2fb6a0aed5f26d466/chrome/browser/resources/options/search_engine_manager_engine_list.js
[modify] https://crrev.com/e34687cdc6fed5fd7d1eede2fb6a0aed5f26d466/chrome/test/data/webui/util_test.html
[modify] https://crrev.com/e34687cdc6fed5fd7d1eede2fb6a0aed5f26d466/chrome/test/data/webui/webui_resource_browsertest.cc
[modify] https://crrev.com/e34687cdc6fed5fd7d1eede2fb6a0aed5f26d466/ui/webui/resources/js/util.js

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/69e9c06e7d12ed26e5a33ede00fe605134e6093e

commit 69e9c06e7d12ed26e5a33ede00fe605134e6093e
Author: dpapad <dpapad@chromium.org>
Date: Wed Apr 27 23:20:59 2016

MD Settings: Search engines, use favicon cache.

BUG= 606445 

Review-Url: https://codereview.chromium.org/1918053002
Cr-Commit-Position: refs/heads/master@{#390229}

[modify] https://crrev.com/69e9c06e7d12ed26e5a33ede00fe605134e6093e/chrome/browser/resources/settings/search_engines_page/omnibox_extension_entry.html
[modify] https://crrev.com/69e9c06e7d12ed26e5a33ede00fe605134e6093e/chrome/browser/resources/settings/search_engines_page/omnibox_extension_entry.js
[modify] https://crrev.com/69e9c06e7d12ed26e5a33ede00fe605134e6093e/chrome/browser/resources/settings/search_engines_page/search_engine_entry.css
[modify] https://crrev.com/69e9c06e7d12ed26e5a33ede00fe605134e6093e/chrome/browser/resources/settings/search_engines_page/search_engine_entry.html
[modify] https://crrev.com/69e9c06e7d12ed26e5a33ede00fe605134e6093e/chrome/browser/resources/settings/search_engines_page/search_engine_entry.js