Roll ICU to 80478
Roll ICU to 80478

The only change in that range was http://codereview.chromium.org/6691033/

BUG=none
TEST=none


Review URL: http://codereview.chromium.org/6691062

git-svn-id: http://src.chromium.org/svn/trunk/src@80501 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 50a4cdc12f31e9ea7e696c482d8eaba4b15cd69b
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser