Allow content to get the system request context, a request context not tied to any profile.

content/browser/content_browser_client.h

 // Copyright (c) 2011 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 CONTENT_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #pragma once
 
 #include <string>
 
@@ skipping 269 matching lines @@
 
   // Returns the default download directory.
   // This can be called on any thread.
   virtual FilePath GetDefaultDownloadDirectory() = 0;
 
   // Returns the "default" request context. There is no such thing in the world
   // of multiple profiles, and all calls to this need to be removed.
   virtual net::URLRequestContextGetter*
       GetDefaultRequestContextDeprecatedCrBug64339() = 0;
 
+  // Returns the system request context, a context tied to no browser context.
+  // This is called on the UI thread.
+  virtual net::URLRequestContextGetter* GetSystemRequestContext() = 0;
+
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Can return an optional fd for crash handling, otherwise returns -1.
   virtual int GetCrashSignalFD(const std::string& process_type) = 0;
 #endif
 
 #if defined(OS_WIN)
   // Returns the name of the dll that contains cursors and other resources.
   virtual const wchar_t* GetResourceDllName() = 0;
 #endif
 
 #if defined(USE_NSS)
   // Return a delegate to authenticate and unlock |module|.
   // This is called on a worker thread.
   virtual
       crypto::CryptoModuleBlockingPasswordDelegate* GetCryptoPasswordDelegate(
           const GURL& url) = 0;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CONTENT_BROWSER_CLIENT_H_