Pull IOThread out of BrowserProcessImpl. Move the dns prefetching initialization into IOThread.

The global host resolver and dns master have changed to be member variables of IOThread.
BUG=26156,26159

Review URL: http://codereview.chromium.org/553026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@36866 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 40 insertions, 0 deletions

diff --git a/chrome/browser/browser_process_sub_thread.cc b/chrome/browser/browser_process_sub_thread.cc
new file mode 100644
index 0000000..2e99d90
--- /dev/null
+++ b/chrome/browser/browser_process_sub_thread.cc
@@ -0,0 +1,40 @@
+// Copyright (c) 2010 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 "chrome/browser/browser_process_sub_thread.h"
+#include "build/build_config.h"
+#include "chrome/common/notification_service.h"
+
+#if defined(OS_WIN)
+#include <Objbase.h>
+#endif
+
+BrowserProcessSubThread::BrowserProcessSubThread(ChromeThread::ID identifier)
+      : ChromeThread(identifier) {}
+
+BrowserProcessSubThread::~BrowserProcessSubThread() {
+  // We cannot rely on our base class to stop the thread since we want our
+  // CleanUp function to run.
+  Stop();
+}
+
+void BrowserProcessSubThread::Init() {
+#if defined(OS_WIN)
+  // Initializes the COM library on the current thread.
+  CoInitialize(NULL);
+#endif
+
+  notification_service_ = new NotificationService;
+}
+
+void BrowserProcessSubThread::CleanUp() {
+  delete notification_service_;
+  notification_service_ = NULL;
+
+#if defined(OS_WIN)
+  // Closes the COM library on the current thread. CoInitialize must
+  // be balanced by a corresponding call to CoUninitialize.
+  CoUninitialize();
+#endif
+}