Mac: make save/open dialogs operate as tab-modal sheets....

chrome/browser/cocoa/bookmark_menu_cocoa_controller.mm

Index: chrome/browser/cocoa/bookmark_menu_cocoa_controller.mm
diff --git a/chrome/browser/cocoa/bookmark_menu_cocoa_controller.mm b/chrome/browser/cocoa/bookmark_menu_cocoa_controller.mm
index f053da71395f4c9b46c76923acc7d4b33449eacd..0ce9fbd104a9ebb1d946dc833030907f3e1406ae 100644
--- a/chrome/browser/cocoa/bookmark_menu_cocoa_controller.mm
+++ b/chrome/browser/cocoa/bookmark_menu_cocoa_controller.mm
@@ -4,8 +4,10 @@
 
 #include "app/gfx/text_elider.h"
 #include "base/sys_string_conversions.h"
+#include "chrome/app/chrome_dll_resource.h"  // IDC_*
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/browser.h"
+#include "chrome/browser/browser_list.h"
 #import "chrome/browser/cocoa/bookmark_menu_bridge.h"
 #import "chrome/browser/cocoa/bookmark_menu_cocoa_controller.h"
 #include "chrome/browser/cocoa/event_utils.h"
@@ -69,5 +71,13 @@ const NSUInteger kMaximumMenuPixelsWide = 300;
   [self openURLForNode:node];
 }
 
-@end  // BookmarkMenuCocoaController
+- (BOOL)validateUserInterfaceItem:(id<NSValidatedUserInterfaceItem>)item {
+  if (Browser* browser = BrowserList::GetLastActive()) {
+    return browser->command_updater()->IsCommandEnabled(
+                                         IDC_BOOKMARK_MENU_CONTENTS) ? YES : NO;
+  }
+  // Enable bookmarks when there's no browser window.
+  return YES;
+}
 
+@end  // BookmarkMenuCocoaController