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diff --git a/components/cronet/android/url_request_context_adapter.h b/components/cronet/android/url_request_context_adapter.h
new file mode 100644
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+++ b/components/cronet/android/url_request_context_adapter.h
@@ -0,0 +1,88 @@
+// Copyright 2014 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 COMPONENTS_CRONET_ANDROID_URL_REQUEST_CONTEXT_ADAPTER_H_
+#define COMPONENTS_CRONET_ANDROID_URL_REQUEST_CONTEXT_ADAPTER_H_
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/thread.h"
+#include "net/base/net_log.h"
+#include "net/base/network_change_notifier.h"
+#include "net/url_request/url_request_context.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace net {
+class NetLogLogger;
+}  // namespace net
+
+namespace cronet {
+
+struct URLRequestContextConfig;
+
+// Implementation of the Chromium NetLog observer interface.
+class NetLogObserver : public net::NetLog::ThreadSafeObserver {
+ public:
+  explicit NetLogObserver() {}
+
+  virtual ~NetLogObserver() {}
+
+  virtual void OnAddEntry(const net::NetLog::Entry& entry) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NetLogObserver);
+};
+
+// Fully configured |URLRequestContext|.
+class URLRequestContextAdapter : public net::URLRequestContextGetter {
+ public:
+  class URLRequestContextAdapterDelegate
+      : public base::RefCountedThreadSafe<URLRequestContextAdapterDelegate> {
+   public:
+    virtual void OnContextInitialized(URLRequestContextAdapter* context) = 0;
+
+   protected:
+    friend class base::RefCountedThreadSafe<URLRequestContextAdapterDelegate>;
+
+    virtual ~URLRequestContextAdapterDelegate() {}
+  };
+
+  URLRequestContextAdapter(URLRequestContextAdapterDelegate* delegate,
+                           std::string user_agent);
+  void Initialize(scoped_ptr<URLRequestContextConfig> config);
+
+  const std::string& GetUserAgent(const GURL& url) const;
+
+  // net::URLRequestContextGetter implementation:
+  virtual net::URLRequestContext* GetURLRequestContext() OVERRIDE;
+  virtual scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
+      const OVERRIDE;
+
+  void StartNetLogToFile(const std::string& file_name);
+  void StopNetLog();
+
+ private:
+  scoped_refptr<URLRequestContextAdapterDelegate> delegate_;
+  scoped_ptr<net::URLRequestContext> context_;
+  std::string user_agent_;
+  base::Thread* network_thread_;
+  scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
+  scoped_ptr<NetLogObserver> net_log_observer_;
+  scoped_ptr<net::NetLogLogger> net_log_logger_;
+
+  virtual ~URLRequestContextAdapter();
+
+  // Initializes |context_| on the IO thread.
+  void InitializeURLRequestContext(scoped_ptr<URLRequestContextConfig> config);
+
+  DISALLOW_COPY_AND_ASSIGN(URLRequestContextAdapter);
+};
+
+}  // namespace cronet
+
+#endif  // COMPONENTS_CRONET_ANDROID_URL_REQUEST_CONTEXT_ADAPTER_H_