Bug 1221644 - Support non-remote html:iframe as tabs in TabActor. r=jryans

devtools/server/actors/webbrowser.js

@@ -345,8 +345,7 @@ BrowserTabList.prototype._getActorForBrowser = function(browser) {
     this._checkListening();
     return actor.connect();
   } else {
-    actor = new BrowserTabActor(this._connection, browser,
-                                browser.getTabBrowser());
+    actor = new BrowserTabActor(this._connection, browser);
     this._actorByBrowser.set(browser, actor);
     this._checkListening();
     return promise.resolve(actor);
@@ -1847,20 +1846,21 @@ exports.TabActor = TabActor;
 
 /**
  * Creates a tab actor for handling requests to a single in-process
- * <browser> tab. Most of the implementation comes from TabActor.
+ * <xul:browser> tab, or <html:iframe>.
+ * Most of the implementation comes from TabActor.
  *
  * @param aConnection DebuggerServerConnection
  *        The connection to the client.
  * @param aBrowser browser
- *        The browser instance that contains this tab.
- * @param aTabBrowser tabbrowser
- *        The tabbrowser that can receive nsIWebProgressListener events.
+ *        The frame instance that contains this tab.
  */
-function BrowserTabActor(aConnection, aBrowser, aTabBrowser)
+function BrowserTabActor(aConnection, aBrowser)
 {
   TabActor.call(this, aConnection, aBrowser);
   this._browser = aBrowser;
-  this._tabbrowser = aTabBrowser;
+  if (typeof(aBrowser.getTabBrowser) == "function") {
+    this._tabbrowser = aBrowser.getTabBrowser();
+  }
 
   Object.defineProperty(this, "docShell", {
     value: this._browser.docShell,