diff -r 000000000000 -r 6474c204b198 dom/speakermanager/SpeakerManagerServiceChild.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/speakermanager/SpeakerManagerServiceChild.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,112 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "SpeakerManagerServiceChild.h"
+#include "mozilla/Services.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/unused.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/ContentParent.h"
+#include "nsIObserverService.h"
+#include "nsThreadUtils.h"
+#include "AudioChannelService.h"
+#include <cutils/properties.h>
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+StaticRefPtr<SpeakerManagerServiceChild> gSpeakerManagerServiceChild;
+
+// static
+SpeakerManagerService*
+SpeakerManagerServiceChild::GetSpeakerManagerService()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  // If we already exist, exit early
+  if (gSpeakerManagerServiceChild) {
+    return gSpeakerManagerServiceChild;
+  }
+
+  // Create new instance, register, return
+  nsRefPtr<SpeakerManagerServiceChild> service = new SpeakerManagerServiceChild();
+  NS_ENSURE_TRUE(service, nullptr);
+
+  gSpeakerManagerServiceChild = service;
+  return gSpeakerManagerServiceChild;
+}
+
+void
+SpeakerManagerServiceChild::ForceSpeaker(bool aEnable, bool aVisible)
+{
+  mVisible = aVisible;
+  mOrgSpeakerStatus = aEnable;
+  ContentChild *cc = ContentChild::GetSingleton();
+  if (cc) {
+    cc->SendSpeakerManagerForceSpeaker(aEnable && aVisible);
+  }
+}
+
+bool
+SpeakerManagerServiceChild::GetSpeakerStatus()
+{
+  ContentChild *cc = ContentChild::GetSingleton();
+  bool status = false;
+  if (cc) {
+    cc->SendSpeakerManagerGetSpeakerStatus(&status);
+  }
+  char propQemu[PROPERTY_VALUE_MAX];
+  property_get("ro.kernel.qemu", propQemu, "");
+  if (!strncmp(propQemu, "1", 1)) {
+    return mOrgSpeakerStatus;
+  }
+  return status;
+}
+
+void
+SpeakerManagerServiceChild::Shutdown()
+{
+  if (gSpeakerManagerServiceChild) {
+    gSpeakerManagerServiceChild = nullptr;
+  }
+}
+
+void
+SpeakerManagerServiceChild::SetAudioChannelActive(bool aIsActive)
+{
+  // Content process and switch to background with no audio and speaker forced.
+  // Then disable speaker
+  for (uint32_t i = 0; i < mRegisteredSpeakerManagers.Length(); i++) {
+    mRegisteredSpeakerManagers[i]->SetAudioChannelActive(aIsActive);
+  }
+}
+
+SpeakerManagerServiceChild::SpeakerManagerServiceChild()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  AudioChannelService* audioChannelService = AudioChannelService::GetAudioChannelService();
+  if (audioChannelService) {
+    audioChannelService->RegisterSpeakerManager(this);
+  }
+  MOZ_COUNT_CTOR(SpeakerManagerServiceChild);
+}
+
+SpeakerManagerServiceChild::~SpeakerManagerServiceChild()
+{
+  AudioChannelService* audioChannelService = AudioChannelService::GetAudioChannelService();
+  if (audioChannelService) {
+    audioChannelService->UnregisterSpeakerManager(this);
+  }
+  MOZ_COUNT_DTOR(SpeakerManagerServiceChild);
+}
+
+void
+SpeakerManagerServiceChild::Notify()
+{
+  for (uint32_t i = 0; i < mRegisteredSpeakerManagers.Length(); i++) {
+    mRegisteredSpeakerManagers[i]->DispatchSimpleEvent(NS_LITERAL_STRING("speakerforcedchange"));
+  }
+}