Revert "Add Accept-Encoding: br for secure Data Reduction Proxy requests."

components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc
index 54a2d1d3f89e7d6d04b0a675565c5f33ba026908..458399272f67dd568c965f019b7ff784d0a61c1f 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc
@@ -849,45 +849,6 @@ TEST_F(DataReductionProxyNetworkDelegateTest,
                                      1);
 }
 
-TEST_F(DataReductionProxyNetworkDelegateTest, TestAcceptEncodingBrotli) {
-  const struct {
-    net::ProxyServer proxy;
-    bool brotli_enabled;
-    std::string expected_accept_encoding;
-  } tests[] = {
-      {net::ProxyServer(net::ProxyServer::SCHEME_HTTPS,
-                        net::HostPortPair("origin.net", 80)),
-       true, "gzip, br"},
-      {net::ProxyServer(net::ProxyServer::SCHEME_QUIC,
-                        net::HostPortPair("origin.net", 80)),
-       true, "gzip, br"},
-      {net::ProxyServer(net::ProxyServer::SCHEME_HTTPS,
-                        net::HostPortPair("origin.net", 80)),
-       false, "gzip"},
-      {net::ProxyServer(net::ProxyServer::SCHEME_HTTP,
-                        net::HostPortPair("origin.net", 80)),
-       true, "gzip"},
-  };
-  for (auto test : tests) {
-    net::ProxyInfo data_reduction_proxy_info;
-    data_reduction_proxy_info.UseProxyServer(test.proxy);
-    net::HttpRequestHeaders headers;
-    headers.SetHeader(net::HttpRequestHeaders::kAcceptEncoding, "gzip");
-    context()->set_enable_brotli(test.brotli_enabled);
-    std::unique_ptr<net::URLRequest> request = context()->CreateRequest(
-        GURL("http://www.google.com/"), net::RequestPriority::IDLE, nullptr);
-
-    network_delegate()->NotifyBeforeSendHeaders(
-        request.get(), data_reduction_proxy_info, net::ProxyRetryInfoMap(),
-        &headers);
-
-    std::string got_accept_encoding;
-    EXPECT_TRUE(headers.GetHeader(net::HttpRequestHeaders::kAcceptEncoding,
-                                  &got_accept_encoding));
-    EXPECT_EQ(test.expected_accept_encoding, got_accept_encoding);
-  }
-}
-
 }  // namespace
 
 }  // namespace data_reduction_proxy