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

chrome/browser/defaults.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/defaults.h"
 
 namespace browser_defaults {
 
 #if defined(OS_CHROMEOS)
 
 const double kAutocompleteEditFontPixelSize = 12.0;
 const double kAutocompleteEditFontPixelSizeInPopup = kAutocompletePopupFontSize;
 
 const int kAutocompletePopupFontSize = 7;
 const SessionStartupPref::Type kDefaultSessionStartupType =
     SessionStartupPref::LAST;
 const int kPinnedTabWidth = 64;
 const bool kCanToggleSystemTitleBar = false;
 const bool kRestorePopups = true;
 const bool kShowImportOnBookmarkBar = false;
 const bool kShowExitMenuItem = false;
+const bool kShowAboutMenuItem = true;
 const bool kOSSupportsOtherBrowsers = false;
 
 #elif defined(OS_LINUX)
 
 // 13.4px = 10pt @ 96dpi.
 const double kAutocompleteEditFontPixelSize = 13.4;
 
 // On Windows, popup windows' autocomplete box have a font 5/6 the size of a
 // regular window, which we duplicate here for GTK.
 const double kAutocompleteEditFontPixelSizeInPopup =
     kAutocompleteEditFontPixelSize * 5.0 / 6.0;
 
 const int kAutocompletePopupFontSize = 10;
 
 #if defined(TOOLKIT_VIEWS)
 const bool kCanToggleSystemTitleBar = false;
 #else
 const bool kCanToggleSystemTitleBar = true;
 #endif
 
 #endif
 
 #if !defined(OS_CHROMEOS)
 
 const SessionStartupPref::Type kDefaultSessionStartupType =
     SessionStartupPref::DEFAULT;
 const int kPinnedTabWidth = 56;
 const bool kRestorePopups = false;
 const bool kShowImportOnBookmarkBar = true;
+#if defined(OS_MACOSX)
+const bool kShowExitMenuItem = false;
+const bool kShowAboutMenuItem = false;
+#else
 const bool kShowExitMenuItem = true;
+const bool kShowAboutMenuItem = true;
+#endif
 const bool kOSSupportsOtherBrowsers = true;
 
 #endif
 
 #if defined(OS_MACOSX)
 const bool kBrowserAliveWithNoWindows = true;
 #else
 const bool kBrowserAliveWithNoWindows = false;
 #endif
 
 }  // namespace browser_defaults