[Net] Propagate priority changes from URLRequest to HttpTransaction

net/url_request/url_request.cc

Index: net/url_request/url_request.cc
diff --git a/net/url_request/url_request.cc b/net/url_request/url_request.cc
index 5d3e26b47fedbce7b639f88bab9879b91e1a9667..739addfb4566603abcb9014e64465d5fb9976a31 100644
--- a/net/url_request/url_request.cc
+++ b/net/url_request/url_request.cc
@@ -525,6 +525,7 @@ void URLRequest::StartJob(URLRequestJob* job) {
                  upload_data_stream_ ? upload_data_stream_->identifier() : -1));
 
   job_ = job;
+  job_->SetPriority(priority_);
   job_->SetExtraRequestHeaders(extra_request_headers_);
 
   if (upload_data_stream_.get())
@@ -828,6 +829,20 @@ int64 URLRequest::GetExpectedContentSize() const {
   return expected_content_size;
 }
 
+void URLRequest::SetPriority(RequestPriority priority) {
+  DCHECK_GE(priority, MINIMUM_PRIORITY);
+  DCHECK_LT(priority, NUM_PRIORITIES);
+  if (priority_ == priority)
+    return;
+
+  priority_ = priority;
+  if (job_) {
+    net_log_.AddEvent(NetLog::TYPE_URL_REQUEST_SET_PRIORITY,
+                      NetLog::IntegerCallback("priority", priority_));
+    job_->SetPriority(priority_);
+  }
+}
+
 bool URLRequest::GetHSTSRedirect(GURL* redirect_url) const {
   const GURL& url = this->url();
   if (!url.SchemeIs("http"))