Mozilla-Central patch for linked data events

gistfile1.js

diff --git a/dom/browser-element/BrowserElementChildPreload.js b/dom/browser-element/BrowserElementChildPreload.js
--- a/dom/browser-element/BrowserElementChildPreload.js
+++ b/dom/browser-element/BrowserElementChildPreload.js
@@ -515,22 +515,28 @@ BrowserElementChild.prototype = {
     let win = e.target.ownerDocument.defaultView;
     // Ignore metas which don't come from the top-level
     // <iframe mozbrowser> window.
     if (win != content) {
       debug('Not top level!');
       return;
     }
 
-    if (!e.target.name) {
+    if (!e.target.name && !e.target.getAttribute('property')) {
       return;
     }
 
     debug('Got metaChanged: (' + e.target.name + ') ' + e.target.content);
 
+    var name = e.target.name || e.target.getAttribute('property');
+    if (name.startsWith('og:')) {
+      this._ogChangedHandler(e.type, e.target);
+      return;
+    }
+
     let handlers = {
       'theme-color': this._themeColorChangedHandler,
       'application-name': this._applicationNameChangedHandler
     };
 
     let handler = handlers[e.target.name];
     if (handler) {
       handler(e.type, e.target);
@@ -694,16 +700,25 @@ BrowserElementChild.prototype = {
       detail.rect.left += currentRect.left;
       detail.rect.right += currentRect.left;
       currentWindow = currentWindow.realFrameElement.ownerDocument.defaultView;
     }
 
     sendAsyncMsg('selectionstatechanged', detail);
   },
 
+  _ogChangedHandler: function(eventType, target) {
+    let meta = {
+      name: target.name || target.getAttribute('property'),
+      content: target.content,
+      type: eventType.replace('DOMMeta', '').toLowerCase()
+    };
+    sendAsyncMsg('metachange', meta);
+  },
+
   _themeColorChangedHandler: function(eventType, target) {
     let meta = {
       name: 'theme-color',
       content: target.content,
       type: eventType.replace('DOMMeta', '').toLowerCase()
     };
     sendAsyncMsg('metachange', meta);
   },