[Extensions Toolbar] Move some popup logic to be platform-agnostic

chrome/browser/ui/views/location_bar/page_action_image_view.cc

 // 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.
 
 #include "chrome/browser/ui/views/location_bar/page_action_image_view.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 135 matching lines @@
   return this;
 }
 
 views::MenuButton* PageActionImageView::GetContextMenuButton() {
   return NULL;  // No menu button for page action views.
 }
 
 content::WebContents* PageActionImageView::GetCurrentWebContents() const {
   return owner_->GetWebContents();
 }
-
-void PageActionImageView::HideActivePopup() {
-  // The only popup that will be active is this popup.
-  view_controller_->HidePopup();
-}