Make USE_EXTERNAL_POPUP_MENU local to content.

content/renderer/external_popup_menu.h

 // 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.
 
 #ifndef CONTENT_RENDERER_EXTERNAL_POPUP_MENU_H_
 #define CONTENT_RENDERER_EXTERNAL_POPUP_MENU_H_
 
 #include <vector>
 
 #include "base/macros.h"
 #include "build/build_config.h"
+#include "content/common/features.h"
 #include "third_party/WebKit/public/web/WebExternalPopupMenu.h"
 #include "third_party/WebKit/public/web/WebPopupMenuInfo.h"
 #include "ui/gfx/geometry/point_f.h"
 
 namespace blink {
 class WebExternalPopupMenuClient;
 }
 
 namespace content {
 class RenderFrameImpl;
 
 class ExternalPopupMenu : public blink::WebExternalPopupMenu {
  public:
   ExternalPopupMenu(RenderFrameImpl* render_frame,
                     const blink::WebPopupMenuInfo& popup_menu_info,
                     blink::WebExternalPopupMenuClient* popup_menu_client);
 
   virtual ~ExternalPopupMenu() {}
 
   void SetOriginScaleAndOffsetForEmulation(
       float scale, const gfx::PointF& offset);
 
-#if defined(USE_EXTERNAL_POPUP_MENU)
+#if BUILDFLAG(USE_EXTERNAL_POPUP_MENU)
 #if defined(OS_MACOSX)
   // Called when the user has selected an item. |selected_item| is -1 if the
   // user canceled the popup.
   void DidSelectItem(int selected_index);
 #else
   // Called when the user has selected items or canceled the popup.
   void DidSelectItems(bool canceled, const std::vector<int>& selected_indices);
 #endif
 #endif
 
@@ skipping 10 matching lines @@
   // These scale and offset are used to properly adjust popup position.
   float origin_scale_for_emulation_;
   gfx::PointF origin_offset_for_emulation_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalPopupMenu);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_EXTERNAL_POPUP_MENU_H_