chromium-browser: various fixes from internal audits

The CustomButton::AcceleratorPressed function in ui/views/controls/button/custombutton.cc in Google Chrome before 48.0.2564.82 allows remote attackers to spoof URLs via vectors involving an unfocused custom button...

chromium-browser: origin confusion in Omnibox

The Omnibox implementation in Google Chrome before 48.0.2564.82 allows remote attackers to spoof a document's origin via unspecified vectors...