[Net] Propagate priority changes from URLRequest to HttpTransaction

net/url_request/url_request_unittest.cc

Index: net/url_request/url_request_unittest.cc
diff --git a/net/url_request/url_request_unittest.cc b/net/url_request/url_request_unittest.cc
index 8ef10a853c89da14750260253cc58b37c36f1406..85e1aa92a51fb020877182aba9a89a807c58a545 100644
--- a/net/url_request/url_request_unittest.cc
+++ b/net/url_request/url_request_unittest.cc
@@ -1404,6 +1404,33 @@ TEST_F(URLRequestTest, RequestCompletionForEmptyResponse) {
   EXPECT_EQ(1, default_network_delegate_.completed_requests());
 }
 
+// Make sure that URLRequest passes on its priority updates to its
+// job.
+TEST_F(URLRequestTest, Priority) {
+  TestDelegate d;
+  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  EXPECT_EQ(LOWEST, req.priority());
+
+  URLRequestTestJob* job =
+      new URLRequestTestJob(&req, &default_network_delegate_);
+  AddTestInterceptor()->set_main_intercept_job(job);
+  EXPECT_EQ(LOWEST, job->priority());
+
+  req.SetPriority(LOW);
+  EXPECT_EQ(LOW, req.priority());
+  // |req| doesn't know about |job| yet.
+  EXPECT_EQ(LOWEST, job->priority());
+
+  req.Start();
+  // |req| now knows about |job|, but |job| doesn't update its
+  // priority.
+  EXPECT_EQ(LOWEST, job->priority());
+
+  req.SetPriority(HIGHEST);
+  EXPECT_EQ(HIGHEST, req.priority());
+  EXPECT_EQ(HIGHEST, job->priority());
+}
+
 // TODO(droger): Support TestServer on iOS (see http://crbug.com/148666).
 #if !defined(OS_IOS)
 // A subclass of TestServer that uses a statically-configured hostname. This is