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

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.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 "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
 #include "base/string_util.h"
@@ skipping 392 matching lines @@
   decoration->UpdateVisibility(contents, GURL(toolbar_model_->GetText()));
 }
 
 NSRect LocationBarViewMac::GetPageActionFrame(ExtensionAction* page_action) {
   PageActionDecoration* decoration = GetPageActionDecoration(page_action);
   if (!decoration)
     return NSZeroRect;
 
   AutocompleteTextFieldCell* cell = [field_ cell];
   NSRect frame = [cell frameForDecoration:decoration inFrame:[field_ bounds]];
-  DCHECK(!NSIsEmptyRect(frame));
   return frame;
 }
 
 NSPoint LocationBarViewMac::GetPageActionBubblePoint(
     ExtensionAction* page_action) {
   PageActionDecoration* decoration = GetPageActionDecoration(page_action);
   if (!decoration)
     return NSZeroPoint;
 
   NSRect frame = GetPageActionFrame(page_action);
-  if (NSIsEmptyRect(frame))
+  if (NSIsEmptyRect(frame)) {
+    // The bubble point positioning assumes that the page action is visible. If
+    // not, something else needs to be done otherwise the bubble will appear
+    // near the top left corner (unanchored).
+    NOTREACHED();
     return NSZeroPoint;
+  }
 
   NSPoint bubble_point = decoration->GetBubblePointInFrame(frame);
   return [field_ convertPoint:bubble_point toView:nil];
 }
 
 NSRect LocationBarViewMac::GetBlockedPopupRect() const {
   const size_t kPopupIndex = CONTENT_SETTINGS_TYPE_POPUPS;
   const LocationBarDecoration* decoration =
       content_setting_decorations_[kPopupIndex];
   if (!decoration || !decoration->IsVisible())
@@ skipping 305 matching lines @@
 void LocationBarViewMac::UpdateChromeToMobileEnabled() {
   if (!chrome_to_mobile_decoration_.get())
     return;
 
   DCHECK(ChromeToMobileService::IsChromeToMobileEnabled());
   bool enabled = [field_ isEditable] && !toolbar_model_->input_in_progress() &&
       ChromeToMobileServiceFactory::GetForProfile(profile_)->HasMobiles();
   chrome_to_mobile_decoration_->SetVisible(enabled);
   command_updater_->UpdateCommandEnabled(IDC_CHROME_TO_MOBILE_PAGE, enabled);
 }