Remove #pragma once from content

content/public/browser/devtools_frontend_host_delegate.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_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_DELEGATE_H_
-#pragma once
 
 #include <string>
 
 namespace content {
 
 // Clients that want to use default DevTools front-end implementation should
 // implement this interface to provide access to the embedding browser from
 // the front-end.
 class DevToolsFrontendHostDelegate {
  public:
@@ skipping 42 matching lines @@
 
   // Invoked when the contents inspected by this devtools frontend is replaced
   // by another contents. This is triggered by
   // TabStripModel::ReplaceTabContentsAt.
   virtual void ContentsReplaced(WebContents* new_contents) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_DELEGATE_H_