Initial check in for print preview work it is complied in for Windows and linix only

The bulk of print preview can be turned on/off with NS_PRINT_PREVIEW define
Bug 107562 r=kmcclusk sr=attinasi

suite/browser/navigator.js

@@ -852,9 +852,18 @@ function BrowserEditBookmarks()
 
 function BrowserPrintPreview()
 {
-  // implement me
+  // using _content.print() until printing becomes scriptable on docShell
+  try {
+    _content.printPreview();
+  } catch (e) {
+    // Pressing cancel is expressed as an NS_ERROR_FAILURE return value,
+    // causing an exception to be thrown which we catch here.
+    // Unfortunately this will also consume helpful failures, so add a
+    // dump(e); // if you need to debug
+  }
 }
 
+
 function BrowserPrintSetup()
 {
   goPageSetup();  // from utilityOverlay.js

suite/browser/navigatorOverlay.xul

@@ -191,7 +191,7 @@
         <menuitem label="&editPageCmd.label;" accesskey="&editPageCmd.accesskey;" key="key_editPage" command="Browser:EditPage" />
         <menuseparator/>
         <!-- Page setup gets inserted here on some platforms -->
-        <!-- <menuitem id="printPreviewMenuItem" label="&printPreviewCmd.label;" accesskey="&printPreviewCmd.accesskey;" command="Browser:PrintPreview"/> -->
+        <menuitem id="printPreviewMenuItem" label="&printPreviewCmd.label;" accesskey="&printPreviewCmd.accesskey;" command="Browser:PrintPreview"/>
         <menuitem id="printMenuItem" label="&printCmd.label;" accesskey="&printCmd.accesskey;" key="printKb" command="Browser:Print"/>
         <menuseparator/>
         <menuitem id="offlineGoOfflineCmd"/>