Remove #pragma once from content

content/public/test/js_injection_ready_observer.h

 // Copyright (c) 2011 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_TEST_JS_INJECTION_READY_OBSERVER_H_
 #define CONTENT_PUBLIC_TEST_JS_INJECTION_READY_OBSERVER_H_
-#pragma once
 
 namespace content {
 class RenderViewHost;
 
 // Interface to notify when JavaScript injection is possible.
 class JsInjectionReadyObserver {
  public:
   // Called to indicate page entry committed and ready for JavaScript
   // injection. |render_view_host| may be used to route injection messages to
   // the appropriate RenderView.
   virtual void OnJsInjectionReady(RenderViewHost* render_view_host) = 0;
 
  protected:
   virtual ~JsInjectionReadyObserver() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_JS_INJECTION_READY_OBSERVER_H_