Cleanup control_frame_fields_ if coalescer rejected the headers.

net/spdy/buffered_spdy_framer.cc

Index: net/spdy/buffered_spdy_framer.cc
diff --git a/net/spdy/buffered_spdy_framer.cc b/net/spdy/buffered_spdy_framer.cc
index fbedb84c1e49a12b334bbed44db7ef79f9bb5e38..f3d7f71c195ac3dfef86e5c5ce6fb39b505dd9eb 100644
--- a/net/spdy/buffered_spdy_framer.cc
+++ b/net/spdy/buffered_spdy_framer.cc
@@ -101,6 +101,7 @@ void BufferedSpdyFramer::OnHeaderFrameEnd(SpdyStreamId stream_id,
   if (coalescer_->error_seen()) {
     visitor_->OnStreamError(stream_id,
                             "Could not parse Spdy Control Frame Header.");
+    control_frame_fields_.reset();
     return;
   }
   DCHECK(control_frame_fields_.get());