Split out audio debug recording from RenderProcessHostImpl.

content/browser/media/audio_debug_recording_impl.h

Index: content/browser/media/audio_debug_recording_impl.h
diff --git a/content/browser/media/audio_debug_recording_impl.h b/content/browser/media/audio_debug_recording_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..9fa738397c72efcffcd76219d8120d540a54575e
--- /dev/null
+++ b/content/browser/media/audio_debug_recording_impl.h
@@ -0,0 +1,88 @@
+// Copyright 2015 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_MEDIA_AUDIO_DEBUG_RECORDING_IMPL_H_
+#define CONTENT_BROWSER_MEDIA_AUDIO_DEBUG_RECORDING_IMPL_H_
+
+#include <map>
+
+#include "base/callback.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "content/common/content_export.h"
+#include "content/common/media/audio_debug_recording.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace content {
+
+class AudioInputRendererHost;
+
+// Implementation of the AudioDebugRecording Mojo service, which is used by
+// renderers to listen for notifications about enabling audio debug recordings.
+// A renderer that wishes to listen for notifications will register an observer
+// by calling RegisterObserver(). When it wishes to stop, it deletes its
+// observer, which will automatically deregister it. There should be one
+// AudioDebugRecordingImpl per renderer host, created the first time the
+// renderer process tries to connect to the Mojo service.
+//
+// This class must always be accessed from the creation thread.
+class CONTENT_EXPORT AudioDebugRecordingImpl
+    : NON_EXPORTED_BASE(public AudioDebugRecording) {
+ public:
+  using DisconnectCallback = base::Callback<void(AudioDebugRecordingImpl*)>;
+
+  AudioDebugRecordingImpl(
+      int render_host_id,
+      const scoped_refptr<AudioInputRendererHost>& audio_input_renderer_host,
+      const DisconnectCallback& disconnect_cb,
+      mojo::InterfaceRequest<AudioDebugRecording> request);
+  ~AudioDebugRecordingImpl() override;
+
+  // Enables/disables audio debug recordings.
+  void EnableAudioDebugRecording(const base::FilePath& file);
+  void DisableAudioDebugRecording();
+
+  int render_host_id() const { return render_host_id_; }
+
+ private:
+  friend class AudioDebugRecordingImplTest;
+
+  class DumpObserver;
+
+  // |AudioDebugRecording| implementaion.
+  void RegisterObserver(int32_t id,
+                        AudioDebugRecordingObserverPtr observer) override;
+
+  // Mojo connection error callback.
+  void OnConnectionError();
+
+  void RemoveObserver(int32_t observer_id);
+
+  // Render process host ID.
+  const int render_host_id_;
+
+  const scoped_refptr<AudioInputRendererHost> audio_input_renderer_host_;
+
+  // Callback for Mojo disconnections.
+  const DisconnectCallback disconnect_cb_;
+
+  // Map of observer ID to connected dump observer.
+  std::map<int32_t, scoped_ptr<DumpObserver>> observers_;
+
+  mojo::Binding<AudioDebugRecording> binding_;
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(AudioDebugRecordingImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_AUDIO_DEBUG_RECORDING_IMPL_H_