Make a shared app menu model and update win and mac to use it. Remove the NSM...

chrome/browser/defaults.h

Index: chrome/browser/defaults.h
===================================================================
--- chrome/browser/defaults.h	(revision 34553)
+++ chrome/browser/defaults.h	(working copy)
@@ -41,12 +41,15 @@
 extern const bool kBrowserAliveWithNoWindows;
 
 // Should a link be shown on the bookmark bar allowing the user to import
-// bookmarks.
+// bookmarks?
 extern const bool kShowImportOnBookmarkBar;
 
-// Should the exit menu be shown?
+// Should the exit menu item be shown in the toolbar menu?
 extern const bool kShowExitMenuItem;
 
+// Should the about menu item be shown in the toolbar app menu?
+extern const bool kShowAboutMenuItem;
+
 // Does the OS support other browsers? If not, operations such as default
 // browser check are not done.
 extern const bool kOSSupportsOtherBrowsers;