Return chrome-proxy-ect header code (post M59 branch)

components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h
index f36cea458de7a0cb5c20d8eb24ea3dcdcc72f9e1..f32107bc5e19d516052fd5262d074b06a2370e9f 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h
@@ -157,6 +157,17 @@ class DataReductionProxyNetworkDelegate : public net::LayeredNetworkDelegate {
       net::HttpRequestHeaders* request_headers,
       const net::URLRequest& request) const;
 
+  // May add chrome-proxy-ect header to |request_headers| if adding of
+  // chrome-proxy-ect is enabled via field trial and a valid estimate of
+  // network quality is available. This method should be called only when the
+  // resolved proxy for |request| is a data saver proxy.
+  void MaybeAddChromeProxyECTHeader(net::HttpRequestHeaders* request_headers,
+                                    const net::URLRequest& request) const;
+
+  // Removes the chrome-proxy-ect header from |request_headers|.
+  void RemoveChromeProxyECTHeader(
+      net::HttpRequestHeaders* request_headers) const;
+
   // All raw Data Reduction Proxy pointers must outlive |this|.
   DataReductionProxyConfig* data_reduction_proxy_config_;