Added a net::BidirectionalStream to expose a bidirectional streaming interface

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 68bdfdf329666df99c4824f895991fbfd52f81df..87184a6955d0520f409a2e5457f88fc390d13297 100644
--- a/net/spdy/spdy_test_util_common.h
+++ b/net/spdy/spdy_test_util_common.h
@@ -468,6 +468,12 @@ class SpdyTestUtil {
                                       const char* const headers[],
                                       int header_count);
 
+  // Constructs a SPDY header frame with END_STREAM flag set to |fin|.
+  SpdyFrame* ConstructSpdyHeaderFrame(int stream_id,
+                                      const char* const headers[],
+                                      int header_count,
+                                      bool fin);
+
   // Construct a SPDY syn (HEADERS or SYN_STREAM, depending on protocol
   // version) carrying exactly the given headers and priority.
   SpdyFrame* ConstructSpdySyn(int stream_id,