Increase read buffer size for SPDY upload

net/spdy/spdy_http_stream.h

Index: net/spdy/spdy_http_stream.h
diff --git a/net/spdy/spdy_http_stream.h b/net/spdy/spdy_http_stream.h
index c77ffea91b0706af9d119d3773030b079e444cdc..25d60e352fc74df2abd71d2d2936b32137ead013 100644
--- a/net/spdy/spdy_http_stream.h
+++ b/net/spdy/spdy_http_stream.h
@@ -32,6 +32,7 @@ class UploadDataStream;
 class NET_EXPORT_PRIVATE SpdyHttpStream : public SpdyStream::Delegate,
                                           public HttpStream {
  public:
+  static const size_t kRequestBodyBufferSize;
   // |spdy_session| must not be NULL.
   SpdyHttpStream(const base::WeakPtr<SpdySession>& spdy_session, bool direct);
   ~SpdyHttpStream() override;