Bug 1470002 - remove pagehide message passing from browser code, r=mixedpuppy

MozReview-Commit-ID: 18hsSwHsWzz

--HG--
extra : rebase_source : f5d93272bd437f135a9d9f8242c3e02be1a2659a

browser/base/content/content.js

@@ -341,13 +341,6 @@ addEventListener("pageshow", function(event) {
     });
   }
 });
-addEventListener("pagehide", function(event) {
-  if (event.target == content.document) {
-    sendAsyncMessage("PageVisibility:Hide", {
-      persisted: event.persisted,
-    });
-  }
-});
 
 var PageMetadataMessenger = {
   init() {

devtools/client/responsive.html/browser/tunnel.js

@@ -400,7 +400,6 @@ MessageManagerTunnel.prototype = {
     // Messages sent to SelectParentHelper.jsm
     "Forms:UpdateDropDown",
     // Messages sent to browser.js
-    "PageVisibility:Hide",
     "PageVisibility:Show",
     // Messages sent to SessionStore.jsm
     "SessionStore:update",