Bug 1412681 - Fix NSS dialogs; r=snorp

The context object for NSS dialogs apparently won't give us a window, so
we have to fall back to the active window.

MozReview-Commit-ID: 4cHpcE8oggL

mobile/android/components/NSSDialogService.js

@@ -56,9 +56,14 @@ NSSDialogs.prototype = {
                                             escapedArgList.length);
   },
 
-  getPrompt: function(aTitle, aText, aButtons, aWindow) {
+  getPrompt: function(aTitle, aText, aButtons, aCtx) {
+    let win = null;
+    try {
+      win = aCtx.getInterface(Ci.nsIDOMWindow);
+    } catch (e) {
+    }
     return new Prompt({
-      window: aWindow,
+      window: win,
       title: aTitle,
       text: aText,
       buttons: aButtons,
@@ -203,10 +208,10 @@ NSSDialogs.prototype = {
     return detailLines.join("<br/>");
   },
 
-  viewCertDetails: function(details, window) {
+  viewCertDetails: function(details, ctx) {
     let p = this.getPrompt(this.getString("clientAuthAsk.message3"),
                     "",
-                    [ this.getString("nssdialogs.ok.label") ], window);
+                    [ this.getString("nssdialogs.ok.label") ], ctx);
     p.addLabel({ label: details });
     this.showPrompt(p);
   },

mobile/android/modules/Prompt.jsm

@@ -20,21 +20,13 @@ function log(msg) {
   Services.console.logStringMessage(msg);
 }
 
-function getRootWindow(win) {
-  // Get the root xul window.
-  return win.QueryInterface(Ci.nsIInterfaceRequestor)
-            .getInterface(Ci.nsIDocShell).QueryInterface(Ci.nsIDocShellTreeItem)
-            .rootTreeItem.QueryInterface(Ci.nsIInterfaceRequestor)
-            .getInterface(Ci.nsIDOMWindow);
-}
-
 function Prompt(aOptions) {
   this.window = "window" in aOptions ? aOptions.window : null;
 
   this.msg = { async: true };
 
   if (this.window) {
-    let window = getRootWindow(this.window);
+    let window = GeckoViewUtils.getChromeWindow(this.window);
     let tab = window &&
               window.document.documentElement
                     .getAttribute("windowtype") === "navigator:browser" &&
@@ -260,7 +252,7 @@ var DoorHanger = {
   },
 
   show: function(aWindow, aMessage, aValue, aButtons, aOptions, aCategory) {
-    let chromeWin = getRootWindow(aWindow);
+    let chromeWin = GeckoViewUtils.getChromeWindow(aWindow);
     if (chromeWin.NativeWindow && chromeWin.NativeWindow.doorhanger) {
       // We're dealing with browser.js.
       return chromeWin.NativeWindow.doorhanger.show(
@@ -299,7 +291,7 @@ var DoorHanger = {
   },
 
   hide: function(aWindow, aValue) {
-    let chromeWin = getRootWindow(aWindow);
+    let chromeWin = GeckoViewUtils.getChromeWindow(aWindow);
     if (chromeWin.NativeWindow && chromeWin.NativeWindow.doorhanger) {
       // We're dealing with browser.js.
       return chromeWin.NativeWindow.doorhanger.hide(