Don't show the button for hidden page/browser actions or script badges.

chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm

Index: chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
===================================================================
--- chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm	(revision 152076)
+++ chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm	(working copy)
@@ -286,7 +286,9 @@
       if (extension_id != page_action_->extension_id())
         break;
       NSRect frame = owner_->GetPageActionFrame(page_action_);
-      ActivatePageAction(frame);
+      // |frame| can be empty if the page action is hidden.
+      if (!NSIsEmptyRect(frame))
+        ActivatePageAction(frame);
       break;
     }