Provide mutable members of UrlRequestContext via pure-virtual interface

net/url_request/url_request_http_job.h

Index: net/url_request/url_request_http_job.h
diff --git a/net/url_request/url_request_http_job.h b/net/url_request/url_request_http_job.h
index b2630463a41a8e12a028698b5c35d13bdec58657..74a28e37bbfdf903b92571a06fb70520ba236846 100644
--- a/net/url_request/url_request_http_job.h
+++ b/net/url_request/url_request_http_job.h
@@ -24,6 +24,7 @@ namespace net {
 class HttpResponseHeaders;
 class HttpResponseInfo;
 class HttpTransaction;
+class HttpUserAgentSettings;
 class URLRequestContext;
 
 // A URLRequestJob subclass that is built on top of HttpTransaction.  It
@@ -35,7 +36,10 @@ class URLRequestHttpJob : public URLRequestJob {
                                 const std::string& scheme);
 
  protected:
-  URLRequestHttpJob(URLRequest* request, NetworkDelegate* network_delegate);
+  URLRequestHttpJob(URLRequest* request,
+                    NetworkDelegate* network_delegate,
+                    HttpUserAgentSettings* http_user_agent_settings);
+
 
   // Shadows URLRequestJob's version of this method so we can grab cookies.
   void NotifyHeadersComplete();
@@ -243,6 +247,8 @@ class URLRequestHttpJob : public URLRequestJob {
 
   scoped_ptr<HttpTransactionDelegateImpl> http_transaction_delegate_;
 
+  HttpUserAgentSettings* http_user_agent_settings_;
+
   DISALLOW_COPY_AND_ASSIGN(URLRequestHttpJob);
 };