[Cronet] Integrate CrNet functionality into Cronet on iOS.

components/cronet/ios/cronet_environment.h

 // Copyright 2016 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_IOS_CRONET_ENVIRONMENT_H_
 #define COMPONENTS_CRONET_IOS_CRONET_ENVIRONMENT_H_
 
 #include <list>
 #include <string>
+#include <vector>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "components/cronet/url_request_context_config.h"
 #include "net/cert/cert_verifier.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
+#include "net/url_request/url_request_context_getter.h"
 
 class JsonPrefStore;
 
 namespace base {
 class WaitableEvent;
 }  // namespace base
 
 namespace net {
 class HttpCache;
 class NetworkChangeNotifier;
 class NetLog;
 class ProxyConfigService;
 class WriteToFileNetLogObserver;
 }  // namespace net
 
 namespace cronet {
 // CronetEnvironment contains all the network stack configuration
 // and initialization.
 class CronetEnvironment {
  public:
   // Initialize Cronet environment globals. Must be called only once on the
   // main thread.
   static void Initialize();
 
-  // |user_agent_product_name| will be used to generate the user-agent.
-  CronetEnvironment(const std::string& user_agent_product_name);
+  // |user_agent| will be used to generate the user-agent if
+  // |user_agent_partial|
+  // is true, or will be used as complete user-agent otherwise.
+  CronetEnvironment(const std::string& user_agent, bool user_agent_partial);
   ~CronetEnvironment();
 
   // Starts this instance of Cronet environment.
   void Start();
 
   // The full user-agent.
   std::string user_agent();
 
+  // Get global UMA histogram deltas.
+  std::vector<uint8_t> GetHistogramDeltas();
+
   // Creates a new net log (overwrites existing file with this name). If
   // actively logging, this call is ignored.
   void StartNetLog(base::FilePath::StringType file_name, bool log_bytes);
   // Stops logging and flushes file. If not currently logging this call is
   // ignored.
   void StopNetLog();
 
   void AddQuicHint(const std::string& host, int port, int alternate_port);
 
   // Setters and getters for |http2_enabled_|, |quic_enabled_|, and
   // |forced_quic_origin_|. These only have any effect before Start() is
   // called.
   void set_http2_enabled(bool enabled) { http2_enabled_ = enabled; }
   void set_quic_enabled(bool enabled) { quic_enabled_ = enabled; }
 
   bool http2_enabled() const { return http2_enabled_; }
   bool quic_enabled() const { return quic_enabled_; }
 
+  void set_accept_language(const std::string& accept_language) {
+    accept_language_ = accept_language;
+  }
+
   void set_cert_verifier(std::unique_ptr<net::CertVerifier> cert_verifier) {
     cert_verifier_ = std::move(cert_verifier);
   }
 
   void set_host_resolver_rules(const std::string& host_resolver_rules) {
     host_resolver_rules_ = host_resolver_rules;
   }
 
   void set_ssl_key_log_file_name(const std::string& ssl_key_log_file_name) {
     ssl_key_log_file_name_ = ssl_key_log_file_name;
   }
 
   net::URLRequestContext* GetURLRequestContext() const;
 
+  net::URLRequestContextGetter* GetURLRequestContextGetter() const;
+
   bool IsOnNetworkThread();
 
   // Runs a closure on the network thread.
   void PostToNetworkThread(const tracked_objects::Location& from_here,
                            const base::Closure& task);
 
  private:
   // Performs initialization tasks that must happen on the network thread.
   void InitializeOnNetworkThread();
 
   // Runs a closure on the file user blocking thread.
   void PostToFileUserBlockingThread(const tracked_objects::Location& from_here,
                                     const base::Closure& task);
 
   // Helper methods that start/stop net logging on the network thread.
   void StartNetLogOnNetworkThread(const base::FilePath::StringType& file_name,
                                   bool log_bytes);
   void StopNetLogOnNetworkThread(base::WaitableEvent* log_stopped_event);
 
   // Returns the HttpNetworkSession object from the passed in
   // URLRequestContext or NULL if none exists.
   net::HttpNetworkSession* GetHttpNetworkSession(
       net::URLRequestContext* context);
 
   bool http2_enabled_;
   bool quic_enabled_;
+  std::string accept_language_;
   std::string host_resolver_rules_;
   std::string ssl_key_log_file_name_;
 
   std::list<net::HostPortPair> quic_hints_;
 
   std::unique_ptr<base::Thread> network_io_thread_;
   std::unique_ptr<base::Thread> network_cache_thread_;
   std::unique_ptr<base::Thread> file_thread_;
   std::unique_ptr<base::Thread> file_user_blocking_thread_;
   scoped_refptr<base::SequencedTaskRunner> pref_store_worker_pool_;
   scoped_refptr<JsonPrefStore> net_pref_store_;
   std::unique_ptr<net::CertVerifier> cert_verifier_;
   std::unique_ptr<net::ProxyConfigService> proxy_config_service_;
   std::unique_ptr<net::HttpServerProperties> http_server_properties_;
   std::unique_ptr<net::URLRequestContext> main_context_;
-  std::string user_agent_product_name_;
+  scoped_refptr<net::URLRequestContextGetter> main_context_getter_;
+  std::string user_agent_;
+  bool user_agent_partial_;
   std::unique_ptr<net::NetLog> net_log_;
   std::unique_ptr<net::WriteToFileNetLogObserver> net_log_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(CronetEnvironment);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_IOS_CRONET_ENVIRONMENT_H_