Fix a SPDY crash bug where a CHECK() is hit because a cancelled stream is considered active by the …

net/spdy/spdy_stream.cc

Index: net/spdy/spdy_stream.cc
diff --git a/net/spdy/spdy_stream.cc b/net/spdy/spdy_stream.cc
index f3828d63e19ab375c6b53e2e547568f627b2db33..277188662eb1ea68559e2d2178b112b7021ecb15 100644
--- a/net/spdy/spdy_stream.cc
+++ b/net/spdy/spdy_stream.cc
@@ -87,6 +87,8 @@ class SpdyStream::SpdyStreamIOBufferProducer
   }
 
   virtual SpdyIOBuffer* ProduceNextBuffer(SpdySession* session) OVERRIDE {
+    if (stream_->cancelled())
+      return NULL;
     if (stream_->stream_id() == 0)
       SpdySession::SpdyIOBufferProducer::ActivateStream(session, stream_);
     frame_.reset(stream_->ProduceNextFrame());
@@ -526,6 +528,8 @@ void SpdyStream::Cancel() {
   cancelled_ = true;
   if (session_->IsStreamActive(stream_id_))
     session_->ResetStream(stream_id_, CANCEL, "");
+  else if (stream_id_ == 0)
+    session_->CloseCreatedStream(this, CANCEL);
 }
 
 void SpdyStream::Close() {