Split out audio debug recording from RenderProcessHostImpl.

content/browser/media/audio_debug_controller.cc

+// 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.
+
+#include "content/browser/media/audio_debug_controller.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/memory/singleton.h"
+#include "base/stl_util.h"
+#include "content/browser/media/audio_debug_recording_impl.h"
+
+namespace content {
+
+// static
+AudioDebugController* AudioDebugController::GetInstance() {
+  return base::Singleton<AudioDebugController>::get();
+}
+
+// static
+void AudioDebugController::CreateService(
+    int render_host_id,
+    const scoped_refptr<AudioInputRendererHost>& audio_input_renderer_host,
+    mojo::InterfaceRequest<AudioDebugRecording> request) {
+  GetInstance()->CreateServiceInternal(
+      render_host_id, audio_input_renderer_host, request.Pass());
+}
+
+AudioDebugController::AudioDebugController() {}
+
+AudioDebugController::~AudioDebugController() {
+  STLDeleteContainerPointers(registered_impls_.begin(),
+                             registered_impls_.end());
+}
+
+void AudioDebugController::EnableAudioDebugRecording(
+    const base::FilePath& file) {
+  for (auto impl : registered_impls_)
+    impl->EnableAudioDebugRecording(file);
+}
+
+void AudioDebugController::DisableAudioDebugRecording() {
+  for (auto impl : registered_impls_)
+    impl->DisableAudioDebugRecording();
+}
+
+void AudioDebugController::CreateServiceInternal(
+    int render_host_id,
+    const scoped_refptr<AudioInputRendererHost>& audio_input_renderer_host,
+    mojo::InterfaceRequest<AudioDebugRecording> request) {
+  AudioDebugRecordingImpl* impl = new AudioDebugRecordingImpl(
+      render_host_id, audio_input_renderer_host,
+      base::Bind(&AudioDebugController::OnDisconnect, base::Unretained(this)),
+      request.Pass());
+  bool inserted = registered_impls_.insert(impl).second;
+  DCHECK(inserted);
+}
+
+void AudioDebugController::OnDisconnect(AudioDebugRecordingImpl* impl) {
+  size_t num_removed = registered_impls_.erase(impl);
+  DCHECK_EQ(num_removed, 1U);
+  delete impl;
+}
+
+}  // namespace content