Issue #1751 -- Remove XP_MACOSX conditionals from the rest of the tree.

This also removes some PP abuse and takes file entries out of PP when no longer
needed without XP_MACOSX conditionals.

toolkit/components/prompts/content/commonDialog.xul

@@ -3,7 +3,6 @@
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
-
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
 <?xml-stylesheet href="chrome://global/content/commonDialog.css" type="text/css"?>
 <?xml-stylesheet href="chrome://global/skin/commonDialog.css" type="text/css"?>
@@ -63,18 +62,9 @@
         <hbox id="iconContainer" align="start">
           <image id="info.icon" class="spaced"/>
         </hbox>
-        <vbox id="infoContainer"
-#ifndef XP_MACOSX
-              pack="center"
-#endif
-        >
-          <!-- Only shown on OS X, since it has no dialog title -->
+        <vbox id="infoContainer" pack="center">
           <description id="info.title"
-#ifndef XP_MACOSX
             hidden="true"
-#else
-            style="margin-bottom: 1em"
-#endif
           />
           <description id="info.body" context="contentAreaContextMenu" noinitialfocus="true"/>
         </vbox>