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/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
Copyright (C) 2015 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
// https://github.com/gorhill/uBlock/issues/533#issuecomment-164292868
// If WebRTC is supported, there won't be an exception if we
// try to instantiate a peer connection object.
// https://github.com/gorhill/uBlock/issues/533#issuecomment-168097594
// Because Chromium leaks WebRTC connections after they have been closed
// and forgotten, we need to test for WebRTC support inside an iframe, this
// way the closed and forgottetn WebRTC connections are properly garbage
// collected.
(function() {
'use strict';
var pc = null;
try {
var PC = self.RTCPeerConnection || self.webkitRTCPeerConnection;
if ( PC ) {
pc = new PC(null);
}
} catch (ex) {
console.error(ex);
}
if ( pc !== null ) {
pc.close();
}
window.top.postMessage(
pc !== null ? 'webRTCSupported' : 'webRTCNotSupported',
window.location.origin
);
})();
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