diff -r 000000000000 -r 6474c204b198 ipc/glue/BrowserProcessSubThread.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/glue/BrowserProcessSubThread.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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 "mozilla/ipc/BrowserProcessSubThread.h"
+#include "chrome/common/notification_service.h"
+
+#if defined(OS_WIN)
+#include <objbase.h>
+#endif
+
+namespace mozilla {
+namespace ipc {
+
+//
+// BrowserProcessSubThread
+//
+
+// Friendly names for the well-known threads.
+static const char* kBrowserThreadNames[BrowserProcessSubThread::ID_COUNT] = {
+  "Gecko_IOThread",  // IO
+//  "Chrome_FileThread",  // FILE
+//  "Chrome_DBThread",  // DB
+//  "Chrome_HistoryThread",  // HISTORY
+#if defined(OS_LINUX)
+  "Gecko_Background_X11Thread",  // BACKGROUND_X11
+#endif
+};
+
+Lock BrowserProcessSubThread::sLock;
+BrowserProcessSubThread* BrowserProcessSubThread::sBrowserThreads[ID_COUNT] = {
+  nullptr,  // IO
+//  nullptr,  // FILE
+//  nullptr,  // DB
+//  nullptr,  // HISTORY
+#if defined(OS_LINUX)
+  nullptr,  // BACKGROUND_X11
+#endif
+};
+
+BrowserProcessSubThread::BrowserProcessSubThread(ID aId) :
+  base::Thread(kBrowserThreadNames[aId]),
+  mIdentifier(aId),
+  mNotificationService(nullptr)
+{
+  AutoLock lock(sLock);
+  DCHECK(aId >= 0 && aId < ID_COUNT);
+  DCHECK(sBrowserThreads[aId] == nullptr);
+  sBrowserThreads[aId] = this;
+}
+
+BrowserProcessSubThread::~BrowserProcessSubThread()
+{
+  Stop();
+  {AutoLock lock(sLock);
+    sBrowserThreads[mIdentifier] = nullptr;
+  }
+
+}
+
+void
+BrowserProcessSubThread::Init()
+{
+#if defined(OS_WIN)
+  // Initializes the COM library on the current thread.
+  CoInitialize(nullptr);
+#endif
+  mNotificationService = new NotificationService();
+}
+
+void
+BrowserProcessSubThread::CleanUp()
+{
+  delete mNotificationService;
+  mNotificationService = nullptr;
+
+#if defined(OS_WIN)
+  // Closes the COM library on the current thread. CoInitialize must
+  // be balanced by a corresponding call to CoUninitialize.
+  CoUninitialize();
+#endif
+}
+
+// static
+MessageLoop*
+BrowserProcessSubThread::GetMessageLoop(ID aId)
+{
+  AutoLock lock(sLock);
+  DCHECK(aId >= 0 && aId < ID_COUNT);
+
+  if (sBrowserThreads[aId])
+    return sBrowserThreads[aId]->message_loop();
+
+  return nullptr;
+}
+
+} // namespace ipc
+} // namespace mozilla