Added QuicAllowed policy. Added unit and browser tests.

chrome/browser/io_thread.h

 // Copyright (c) 2012 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_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 301 matching lines @@
     return NULL;
 #endif
   }
   // Configures QUIC options in |globals| based on the flags in |command_line|
   // as well as the QUIC field trial group and parameters.  Must be called
   // before ConfigureSpdyGlobals.
   static void ConfigureQuicGlobals(
       const base::CommandLine& command_line,
       base::StringPiece quic_trial_group,
       const VariationParameters& quic_trial_params,
+      bool quic_allowed_by_policy,
       Globals* globals);
 
   // Returns true if QUIC should be enabled, either as a result
   // of a field trial or a command line flag.
   static bool ShouldEnableQuic(
       const base::CommandLine& command_line,
-      base::StringPiece quic_trial_group);
+      base::StringPiece quic_trial_group,
+      bool quic_allowed_by_policy);
 
   // Returns true if QUIC should be enabled for proxies, either as a result
   // of a field trial or a command line flag.
   static bool ShouldEnableQuicForProxies(
       const base::CommandLine& command_line,
-      base::StringPiece quic_trial_group);
+      base::StringPiece quic_trial_group,
+      bool quic_allowed_by_policy);
 
   // Returns true if the selection of the ephemeral port in bind() should be
   // performed by Chromium, and false if the OS should select the port.  The OS
   // option is used to prevent Windows from posting a security security warning
   // dialog.
   static bool ShouldEnableQuicPortSelection(
       const base::CommandLine& command_line);
 
   // Returns true if QUIC packet pacing should be negotiated during the
   // QUIC handshake.
@@ skipping 122 matching lines @@
   scoped_ptr<net::ProxyConfigService> system_proxy_config_service_;
 
   scoped_ptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
 
   scoped_refptr<net::URLRequestContextGetter>
       system_url_request_context_getter_;
 
   // True if SPDY is disabled by policy.
   bool is_spdy_disabled_by_policy_;
 
+  // True if QUIC is allowed by policy.
+  bool is_quic_allowed_by_policy_;
+
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_