Convert enable_plugins to a buildflag header.

components/renderer_context_menu/render_view_context_menu_base.cc

 // Copyright 2014 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 "components/renderer_context_menu/render_view_context_menu_base.h"
 
 #include <algorithm>
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/menu_item.h"
+#include "ppapi/features/features.h"
 #include "third_party/WebKit/public/web/WebContextMenuData.h"
 
 using blink::WebContextMenuData;
 using blink::WebString;
 using blink::WebURL;
 using content::BrowserContext;
 using content::OpenURLParams;
 using content::RenderFrameHost;
 using content::RenderViewHost;
 using content::WebContents;
@@ skipping 273 matching lines @@
   // it to the observer.
   for (auto& observer : observers_) {
     if (observer.IsCommandIdSupported(id))
       return observer.ExecuteCommand(id);
   }
 
   // Process custom actions range.
   if (IsContentCustomCommandId(id)) {
     unsigned action = id - content_context_custom_first;
     const content::CustomContextMenuContext& context = params_.custom_context;
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
     if (context.request_id && !context.is_pepper_menu)
       HandleAuthorizeAllPlugins();
 #endif
     source_web_contents_->ExecuteCustomContextMenuCommand(action, context);
     return;
   }
   command_executed_ = false;
 }
 
 void RenderViewContextMenuBase::MenuWillShow(ui::SimpleMenuModel* source) {
@@ skipping 75 matching lines @@
   NotifyURLOpened(url, new_contents);
 }
 
 bool RenderViewContextMenuBase::IsCustomItemChecked(int id) const {
   return IsCustomItemCheckedInternal(params_.custom_items, id);
 }
 
 bool RenderViewContextMenuBase::IsCustomItemEnabled(int id) const {
   return IsCustomItemEnabledInternal(params_.custom_items, id);
 }