QUIC enable server push by default. Guarded by FLAGS_quic_enable_server_push_by_default.

net/quic/core/quic_headers_stream.h

Index: net/quic/core/quic_headers_stream.h
diff --git a/net/quic/core/quic_headers_stream.h b/net/quic/core/quic_headers_stream.h
index db1b123fb54ab2a684fe5ed6fb2a5e07bbdb13da..89a8c3f2330a8a472aa1a2c0097e20c0cc03fff5 100644
--- a/net/quic/core/quic_headers_stream.h
+++ b/net/quic/core/quic_headers_stream.h
@@ -91,6 +91,10 @@ class NET_EXPORT_PRIVATE QuicHeadersStream : public ReliableQuicStream {
   // willing to use to decode header blocks.
   void UpdateHeaderEncoderTableSize(uint32_t value);
 
+  // Called when SETTINGS_ENABLE_PUSH is received, only supported on
+  // server side.
+  void UpdateEnableServerPush(bool value);
+
   // Sets how much encoded data the hpack decoder of spdy_framer_ is willing to
   // buffer.
   void set_max_decode_buffer_size_bytes(size_t max_decode_buffer_size_bytes) {