Initial implementation of RequestPriority-based HTTP/2 dependencies.

net/spdy/spdy_test_util_common.h

Index: net/spdy/spdy_test_util_common.h
diff --git a/net/spdy/spdy_test_util_common.h b/net/spdy/spdy_test_util_common.h
index 7a3d272cb9ce9146e6c1403ed6d8495ef2301508..022d02060557e22afbad40360c5f0261475ffb10 100644
--- a/net/spdy/spdy_test_util_common.h
+++ b/net/spdy/spdy_test_util_common.h
@@ -298,7 +298,8 @@ class SpdySessionPoolPeer {
 
 class SpdyTestUtil {
  public:
-  explicit SpdyTestUtil(NextProto protocol);
+  explicit SpdyTestUtil(NextProto protocol, bool dependency_priorities);
+  ~SpdyTestUtil();
 
   // Add the appropriate headers to put |url| into |block|.
   void AddUrlToHeaderBlock(base::StringPiece url,
@@ -552,6 +553,11 @@ class SpdyTestUtil {
   SpdyFrame* ConstructWrappedSpdyFrame(const scoped_ptr<SpdyFrame>& frame,
                                        int stream_id);
 
+  // Called when necessary (when it will affect stream dependency specification
+  // when setting dependencies based on priorioties) to notify the utility
+  // class of stream destruction.
+  void OnStreamDestruction(int stream_id);
+
   const SpdyHeaderInfo MakeSpdyHeader(SpdyFrameType type);
 
   // For versions below SPDY4, adds the version HTTP/1.1 header.
@@ -587,6 +593,10 @@ class SpdyTestUtil {
   const NextProto protocol_;
   const SpdyMajorVersion spdy_version_;
   GURL default_url_;
+  bool dependency_priorities_;
+
+  // Track a FIFO list of the stream_id of all created requests by priority.
+  mutable std::map<int, std::vector<int>> priority_to_stream_id_list_;

[Bence, 2015/11/11 18:47:15]

I don't understand why relevant SpdyTestUtil methods are const.  (I actually
don't see a const SpdyTestUtil anywhere.)  Maybe methods changing this member
should not be const in the first place, instead of making this member mutable.

[Randy Smith (Not in Mondays), 2015/11/11 23:25:59]

Done.

 };
 
 }  // namespace net