Stop using SpdySynStreamIR for SPDY 4.

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 38c4139aaa8e8a2f9520ee31b3d4e11765b10591..108e278541667ad0904983ec467204b66312921f 100644
--- a/net/spdy/spdy_test_util_common.h
+++ b/net/spdy/spdy_test_util_common.h
@@ -465,6 +465,14 @@ class SpdyTestUtil {
                                       const char* const extra_headers[],
                                       int extra_header_count);
 
+  // Construct a SPDY syn (HEADERS or SYN_STREAM, depending on protocol
+  // version) carrying exactly the given headers and priority.
+  SpdyFrame* ConstructSpdySyn(int stream_id,
+                              const SpdyHeaderBlock& headers,
+                              RequestPriority priority,
+                              bool compressed,
+                              bool fin) const;
+
   // Construct a SPDY reply (HEADERS or SYN_REPLY, depending on protocol
   // version) carrying exactly the given headers, and the default priority
   // (or no priority, depending on protocl version).