Move enable_webrtc to a buildflag header.

content/browser/webrtc/webrtc_internals.h

 // Copyright (c) 2013 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_BROWSER_WEBRTC_WEBRTC_INTERNALS_H_
 #define CONTENT_BROWSER_WEBRTC_WEBRTC_INTERNALS_H_
 
 #include <memory>
 #include <queue>
 #include <string>
 
 #include "base/containers/hash_tables.h"
 #include "base/gtest_prod_util.h"
 #include "base/lazy_instance.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/process/process.h"
 #include "base/threading/thread_checker.h"
 #include "base/values.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/render_process_host_observer.h"
+#include "media/media_features.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 
 namespace device {
 class PowerSaveBlocker;
 }  // namespace device
 
 namespace content {
 
 class WebContents;
 class WebRTCInternalsUIObserver;
@@ skipping 108 matching lines @@
 
   // ui::SelectFileDialog::Listener implementation.
   void FileSelected(const base::FilePath& path,
                     int index,
                     void* unused_params) override;
   void FileSelectionCanceled(void* params) override;
 
   // Called when a renderer exits (including crashes).
   void OnRendererExit(int render_process_id);
 
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   // Enables diagnostic audio recordings on all render process hosts using
   // |audio_debug_recordings_file_path_|.
   void EnableAudioDebugRecordingsOnAllRenderProcessHosts();
 
   // Enables event log recordings on all render process hosts using
   // |event_log_recordings_file_path_|.
   void EnableEventLogRecordingsOnAllRenderProcessHosts();
 #endif
 
   // Updates the number of open PeerConnections. Called when a PeerConnection
@@ skipping 88 matching lines @@
   std::queue<PendingUpdate> pending_updates_;
   const int aggregate_updates_ms_;
 
   // Weak factory for this object that we use for bulking up updates.
   base::WeakPtrFactory<WebRTCInternals> weak_factory_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEBRTC_WEBRTC_INTERNALS_H_