Remove #pragma once from content

content/browser/renderer_host/media/audio_renderer_host.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.
 //
 // AudioRendererHost serves audio related requests from AudioRenderer which
 // lives inside the render process and provide access to audio hardware.
 //
 // This class is owned by BrowserRenderProcessHost, and instantiated on UI
 // thread, but all other operations and method calls happen on IO thread, so we
 // need to be extra careful about the lifetime of this object. AudioManager is a
@@ skipping 18 matching lines @@
 //      |          PlayStream >         |
 //      |  < NotifyStreamStateChanged   | kAudioStreamPlaying
 //      |             ...               |
 //      |         CloseStream >         |
 //      v                               v
 
 // A SyncSocket pair is used to signal buffer readiness between processes.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_
-#pragma once
 
 #include <map>
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/shared_memory.h"
 #include "content/common/content_export.h"
@@ skipping 130 matching lines @@
   // A map of stream IDs to audio sources.
   AudioEntryMap audio_entries_;
 
   media::AudioManager* audio_manager_;
   content::MediaObserver* media_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_