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

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

Index: chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
===================================================================
--- chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm	(revision 152078)
+++ chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm	(working copy)
@@ -410,7 +410,6 @@
 
   AutocompleteTextFieldCell* cell = [field_ cell];
   NSRect frame = [cell frameForDecoration:decoration inFrame:[field_ bounds]];
-  DCHECK(!NSIsEmptyRect(frame));
   return frame;
 }
 
@@ -421,8 +420,10 @@
     return NSZeroPoint;
 
   NSRect frame = GetPageActionFrame(page_action);
-  if (NSIsEmptyRect(frame))
+  if (NSIsEmptyRect(frame)) {
+    NOTREACHED();

[Scott Hess - ex-Googler, 2012/08/17 17:13:17]

I was thinking "Well, then, why is this here?"  Maybe there should be a comment
like "The bubble point positioning assumes that the page action is visible.  If
not, something else needs to be done."

     return NSZeroPoint;
+  }
 
   NSPoint bubble_point = decoration->GetBubblePointInFrame(frame);
   return [field_ convertPoint:bubble_point toView:nil];