Page actions behave as disableable browser actions when script badges are enabled.

chrome/browser/ui/cocoa/extensions/browser_actions_controller.mm

 // Copyright (c) 2012 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.
 
 #import "browser_actions_controller.h"
 
 #include <cmath>
 #include <string>
 
 #include "base/sys_string_conversions.h"
@@ skipping 795 matching lines @@
   }
   [chevronAnimation_ setViewAnimations:
       [NSArray arrayWithObject:animationDictionary]];
   [chevronAnimation_ startAnimation];
 }
 
 - (void)chevronItemSelected:(id)menuItem {
   [self browserActionClicked:[menuItem representedObject]];
 }
 
+// TODO(yoz): This only gets called when the set of actions in the overflow
+// menu changes (not for things that would update page actions).
+// It should instead be called each time the menu is opened.
 - (void)updateOverflowMenu {
   overflowMenu_.reset([[NSMenu alloc] initWithTitle:@""]);
   // See menu_button.h for documentation on why this is needed.
   [overflowMenu_ addItemWithTitle:@"" action:nil keyEquivalent:@""];
+  [overflowMenu_ setAutoenablesItems:NO];
 
   for (BrowserActionButton* button in hiddenButtons_.get()) {
     NSString* name = base::SysUTF8ToNSString([button extension]->name());
     NSMenuItem* item =
         [overflowMenu_ addItemWithTitle:name
                                  action:@selector(chevronItemSelected:)
                           keyEquivalent:@""];
     [item setRepresentedObject:button];
     [item setImage:[button compositedImage]];
     [item setTarget:self];
+    [item setEnabled:[button isEnabled]];
   }
   [chevronMenuButton_ setAttachedMenu:overflowMenu_];
 }
 
 - (void)updateGrippyCursors {
   [containerView_ setCanDragLeft:[hiddenButtons_ count] > 0];
   [containerView_ setCanDragRight:[self visibleButtonCount] > 0];
   [[containerView_ window] invalidateCursorRectsForView:containerView_];
 }
 
@@ skipping 12 matching lines @@
   if (profile_->IsOffTheRecord())
     index = toolbarModel_->IncognitoIndexToOriginal(index);
   if (index < toolbarModel_->size()) {
     const Extension* extension = toolbarModel_->GetExtensionByIndex(index);
     return [buttons_ objectForKey:base::SysUTF8ToNSString(extension->id())];
   }
   return nil;
 }
 
 @end