Big Change Update

uBlock0.chromium/js/is-webrtc-supported.js

@@ -0,0 +1,52 @@
+/*******************************************************************************
+
+    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        
+    );
+})();