Add a new SpdyStream::Delegate method to handle trailers

net/spdy/spdy_stream.h

Index: net/spdy/spdy_stream.h
diff --git a/net/spdy/spdy_stream.h b/net/spdy/spdy_stream.h
index 4c01e0cecef2c2234fdf9eea32b4a8a4fe4a1c93..06bd8b4d602ce2e65283ae2875a535b555adb18b 100644
--- a/net/spdy/spdy_stream.h
+++ b/net/spdy/spdy_stream.h
@@ -57,7 +57,8 @@ enum SpdySendStatus {
 // whether the current response headers are complete or not.
 enum SpdyResponseHeadersStatus {
   RESPONSE_HEADERS_ARE_INCOMPLETE,
-  RESPONSE_HEADERS_ARE_COMPLETE
+  RESPONSE_HEADERS_ARE_COMPLETE,
+  TRAILERS_RECEIVED,
 };
 
 // The SpdyStream is used by the SpdySession to represent each stream known
@@ -148,6 +149,9 @@ class NET_EXPORT_PRIVATE SpdyStream {
     // handle it gracefully.
     virtual void OnClose(int status) = 0;
 
+    // TODO
+    virtual void OnTrailers(const SpdyHeaderBlock& trailers);
+
    protected:
     virtual ~Delegate() {}