Make URLRequest's constructor private, and make URLRequestContext a friend class.

net/url_request/url_request_test_util.cc

Index: net/url_request/url_request_test_util.cc
diff --git a/net/url_request/url_request_test_util.cc b/net/url_request/url_request_test_util.cc
index fcdae3be217e3ec43c538f2a436a9c0cf1b68a8a..2d3f3aac9549c980f5e9dc0dde700a7c73fd0948 100644
--- a/net/url_request/url_request_test_util.cc
+++ b/net/url_request/url_request_test_util.cc
@@ -130,15 +130,6 @@ void TestURLRequestContext::Init() {
     context_storage_.set_job_factory(new URLRequestJobFactoryImpl);
 }
 
-TestURLRequest::TestURLRequest(const GURL& url,
-                               RequestPriority priority,
-                               Delegate* delegate,
-                               TestURLRequestContext* context)
-    : URLRequest(url, priority, delegate, context, NULL, NULL) {}
-
-TestURLRequest::~TestURLRequest() {
-}
-
 TestURLRequestContextGetter::TestURLRequestContextGetter(
     const scoped_refptr<base::SingleThreadTaskRunner>& network_task_runner)
     : network_task_runner_(network_task_runner) {