[Cronet] Hook up library loader, system proxy and network change notifier to async api.

components/cronet/android/url_request_context_adapter.h

 // 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 <queue>
 #include <string>
 
@@ skipping 80 matching lines @@
   scoped_ptr<net::URLRequestContext> context_;
   std::string user_agent_;
   base::Thread* network_thread_;
   scoped_ptr<NetLogObserver> net_log_observer_;
   scoped_ptr<net::NetLogLogger> net_log_logger_;
   scoped_ptr<net::ProxyConfigService> proxy_config_service_;
   scoped_ptr<URLRequestContextConfig> config_;
 
   // A queue of tasks that need to be run after context has been initialized.
   std::queue<RunAfterContextInitTask> tasks_waiting_for_context_;
-  bool is_context_initialized_ = false;
+  bool is_context_initialized_;
 
   virtual ~URLRequestContextAdapter();
 
   // Initializes |context_| on the Network thread.
   void InitRequestContextOnNetworkThread();
 
   // Helper function to start writing NetLog data to file. This should only be
   // run after context is initialized.
   void StartNetLogToFileHelper(const std::string& file_name);
   // Helper function to stop writing NetLog data to file. This should only be
   // run after context is initialized.
   void StopNetLogHelper();
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextAdapter);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_ANDROID_URL_REQUEST_CONTEXT_ADAPTER_H_