Fix a potential infinite loop in HttpStreamFactoryImpl when a new SpdySession is established

net/http/http_stream_factory_impl.h

Index: net/http/http_stream_factory_impl.h
diff --git a/net/http/http_stream_factory_impl.h b/net/http/http_stream_factory_impl.h
index e1b2c7f3a93da9fa5c3f001e64aab97f3a973079..4ef85bf3c3131322040d9f2f8f3ed447da03091e 100644
--- a/net/http/http_stream_factory_impl.h
+++ b/net/http/http_stream_factory_impl.h
@@ -76,6 +76,10 @@ class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
   void DumpMemoryStats(base::trace_event::ProcessMemoryDump* pmd,
                        const std::string& parent_absolute_name) const override;
 
+  // Removes |request| from |spdy_session_request_map_|. Note that |request| is
+  // not owned by |this|.
+  void RemoveRequestFromSpdySessionRequestMap(Request* request);
+
   enum JobType {
     MAIN,
     ALTERNATIVE,