Popup init update (#497)

* Add API function to send a message to a specific frameId in a tab

* Update _windowMessageHandlers to support additional info per handler

* Remove message token

* Add new authorization check

* Set up new initialization handler

* Update initialization

* Remove message token

* Replace 'prepare' with 'configure'

* Create new prepare function

* Change configure guard

* Log errors in onMessage

* Improve popup initialize function

* Clear secret/token in _resetFrame

* Remove backend message token

* Clear src and srcdoc attributes before loading

* Don't treat about:blank unloads as load events

1 files changed, 4 insertions, 4 deletions

diff --git a/ext/mixed/js/api.js b/ext/mixed/js/api.js
index bf85338e..ca4bdd6c 100644
--- a/ext/mixed/js/api.js
+++ b/ext/mixed/js/api.js
@@ -76,6 +76,10 @@ function apiScreenshotGet(options) {
     return _apiInvoke('screenshotGet', {options});
 }
 
+function apiSendMessageToFrame(frameId, action, params) {
+    return _apiInvoke('sendMessageToFrame', {frameId, action, params});
+}
+
 function apiBroadcastTab(action, params) {
     return _apiInvoke('broadcastTab', {action, params});
 }
@@ -108,10 +112,6 @@ function apiGetZoom() {
     return _apiInvoke('getZoom');
 }
 
-function apiGetMessageToken() {
-    return _apiInvoke('getMessageToken');
-}
-
 function apiGetDefaultAnkiFieldTemplates() {
     return _apiInvoke('getDefaultAnkiFieldTemplates');
 }