Bug 1362461 - Use real URL instead of about:support and about:downloads. rs=bustage-fix

mail/test/mozmill/content-tabs/test-about-support.js

@@ -62,7 +62,7 @@ const ABOUT_SUPPORT_ERROR_STRINGS = new Map([[ "text/html",["undefined", "null"]
  */
 function open_about_support() {
   let tab = open_content_tab_with_click(mc.menus.helpMenu.aboutsupport_open,
-                                        "about:support");
+                                        "chrome://messenger/content/about-support/aboutSupport.xhtml");
   // We have one variable that's asynchronously populated -- wait for it to be
   // populated.
   mc.waitFor(() => (tab.browser.contentWindow.gAccountDetails !== undefined),

mail/test/mozmill/downloads/test-about-downloads.js

@@ -123,7 +123,7 @@ function open_about_downloads() {
   mc.waitFor(() => mc.tabmail.tabContainer.childNodes.length == preCount + 1,
              "Timeout waiting for about:downloads tab");
 
-  wait_for_browser_load(newTab.browser, "about:downloads");
+  wait_for_browser_load(newTab.browser, "chrome://messenger/content/downloads/aboutDownloads.xul");
   // We append new tabs at the end, so check the last one.
   let expectedNewTab = mc.tabmail.tabInfo[preCount];
   return expectedNewTab;