Fix bug in net::RequestPriority -> HTTP/2 dependency conversion.

net/spdy/spdy_test_util_common.cc

Index: net/spdy/spdy_test_util_common.cc
diff --git a/net/spdy/spdy_test_util_common.cc b/net/spdy/spdy_test_util_common.cc
index c6efdfe05935b3618a8f21ce58c721d0d7fb3da8..8db707774d71b8ea524e82f31a7eaed222e96b73 100644
--- a/net/spdy/spdy_test_util_common.cc
+++ b/net/spdy/spdy_test_util_common.cc
@@ -1043,8 +1043,11 @@ SpdyFrame* SpdyTestUtil::ConstructSpdySyn(int stream_id,
   // Get the stream id of the next highest priority request
   // (most recent request of the same priority, or last request of
   // an earlier priority).
+  // Note that this is a duplicate of the logic in Http2PriorityDependencies,
+  // and hence tests using this function do not effectively test that logic.
+  // That logic is tested by the Http2PriorityDependencies unit tests.
   int parent_stream_id = 0;
-  for (int q = priority; q >= IDLE; --q) {
+  for (int q = priority; q <= HIGHEST; ++q) {
     if (!priority_to_stream_id_list_[q].empty()) {
       parent_stream_id = priority_to_stream_id_list_[q].back();
       break;