Remove some calls to URLRequestContext::network_delegate().

net/url_request/url_request.h

Index: net/url_request/url_request.h
diff --git a/net/url_request/url_request.h b/net/url_request/url_request.h
index 5580b63eef8925633345c155f356b403b120a26d..c61bac4602a29cf7712d5328124a00b58aa98554 100644
--- a/net/url_request/url_request.h
+++ b/net/url_request/url_request.h
@@ -531,6 +531,10 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
   // Returns a globally unique identifier for this request.
   uint64 identifier() const { return identifier_; }
 
+  // Returns true if the request has a network delegate that can throttle the
+  // request.  If the request has no network delegate, it will also return true.
+  bool CanThrottle() const;
+
   // This method is called to start the request.  The delegate will receive
   // a OnResponseStarted callback when the request is started.
   void Start();
@@ -608,6 +612,9 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
   // Used to specify the context (cookie store, cache) for this request.
   const URLRequestContext* context() const;
 
+  // Used to access the network delegate for this request.
+  NetworkDelegate* network_delegate() const;
+
   const BoundNetLog& net_log() const { return net_log_; }
 
   // Returns the expected content size if available