Move initialization of ChromeURLRequestContexts to the IO thread.

chrome/browser/net/url_request_context_getter.h

+// Copyright (c) 2009 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 CHROME_BROWSER_NET_URL_REQUEST_CONTEXT_GETTER_H_
+#define CHROME_BROWSER_NET_URL_REQUEST_CONTEXT_GETTER_H_
+
+#include "base/ref_counted.h"
+
+namespace net {
+class CookieStore;
+}
+
+class URLRequestContext;
+
+// Interface for retrieving an URLRequestContext.
+class URLRequestContextGetter
+    : public base::RefCountedThreadSafe<URLRequestContextGetter> {
+ public:
+  virtual ~URLRequestContextGetter() {}
+
+  virtual URLRequestContext* GetURLRequestContext() = 0;
+
+  // Defaults to GetURLRequestContext()->cookie_store(), but
+  // implementations can override it.
+  virtual net::CookieStore* GetCookieStore();
+};
+
+#endif  // CHROME_BROWSER_NET_URL_REQUEST_CONTEXT_GETTER_H_
+