CCing kolos@ who said that his team might want to use chrome://large-icon. Will delay removal till we figure whether they actually do

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e4030d6daba664202cae56cdfb0de6da75e9038b

commit e4030d6daba664202cae56cdfb0de6da75e9038b
Author: pkotwicz <pkotwicz@chromium.org>
Date: Tue Jun 06 17:45:11 2017

Remove unused chrome://large-icon

chrome://large-icon is no longer used now that Android uses native UI for
history. References to chrome://large-icon were removed in
https://codereview.chromium.org/2830983005

BUG= 724161 

Review-Url: https://codereview.chromium.org/2917733002
Cr-Commit-Position: refs/heads/master@{#477331}

[modify] https://crrev.com/e4030d6daba664202cae56cdfb0de6da75e9038b/chrome/browser/ui/BUILD.gn
[modify] https://crrev.com/e4030d6daba664202cae56cdfb0de6da75e9038b/chrome/browser/ui/webui/browsing_history_handler.cc
[delete] https://crrev.com/40c3d19c6990288bb88f28086e088306feae4766/chrome/browser/ui/webui/large_icon_source.cc
[delete] https://crrev.com/40c3d19c6990288bb88f28086e088306feae4766/chrome/browser/ui/webui/large_icon_source.h
[modify] https://crrev.com/e4030d6daba664202cae56cdfb0de6da75e9038b/chrome/common/url_constants.cc
[modify] https://crrev.com/e4030d6daba664202cae56cdfb0de6da75e9038b/chrome/common/url_constants.h
[modify] https://crrev.com/e4030d6daba664202cae56cdfb0de6da75e9038b/components/favicon_base/BUILD.gn
[delete] https://crrev.com/40c3d19c6990288bb88f28086e088306feae4766/components/favicon_base/large_icon_url_parser.cc
[delete] https://crrev.com/40c3d19c6990288bb88f28086e088306feae4766/components/favicon_base/large_icon_url_parser.h
[delete] https://crrev.com/40c3d19c6990288bb88f28086e088306feae4766/components/favicon_base/large_icon_url_parser_unittest.cc