fix about window positioning on Macs. b=295282 r=mano sr=mconnor a=mconnor

git-svn-id: svn://10.0.0.236/trunk@177286 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/browser/base/content/aboutDialog.js

@@ -48,6 +48,11 @@ function init(aEvent)
   button.addEventListener("command", switchPage, false);
 
   document.documentElement.getButton("accept").focus();
+#ifdef XP_MACOSX
+  // it may not be sized at this point, and we need its width to calculate its position
+  window.sizeToContent();
+  window.moveTo((screen.availWidth / 2) - (window.outerWidth / 2), screen.availHeight / 5);
+#endif
 }
 
 function uninit(aEvent)

mozilla/browser/base/content/utilityOverlay.js

@@ -406,7 +406,7 @@ function openAboutDialog()
     // XXXmano: define minimizable=no although it does nothing on OS X
     // (see Bug 287162); remove this comment once Bug 287162 is fixed...
     window.open("chrome://browser/content/aboutDialog.xul", "About",
-                "centerscreen,chrome,resizable=no, minimizable=no");
+                "chrome, resizable=no, minimizable=no");
   }
 #else
   window.openDialog("chrome://browser/content/aboutDialog.xul", "About", "modal,centerscreen,chrome,resizable=no");