[Cronet] Enable Brotli

components/cronet/url_request_context_config.cc

Index: components/cronet/url_request_context_config.cc
diff --git a/components/cronet/url_request_context_config.cc b/components/cronet/url_request_context_config.cc
index f9b64d6023e8d05f66a3a29023d8c56fef9bd70b..719ee61681806c66a6d3fbe5e155799e6a0e0603 100644
--- a/components/cronet/url_request_context_config.cc
+++ b/components/cronet/url_request_context_config.cc
@@ -356,6 +356,7 @@ URLRequestContextConfig::URLRequestContextConfig(
     const std::string& quic_user_agent_id,
     bool enable_spdy,
     bool enable_sdch,
+    bool enable_brotli,
     HttpCacheType http_cache,
     int http_cache_max_size,
     bool load_disable_cache,
@@ -374,6 +375,7 @@ URLRequestContextConfig::URLRequestContextConfig(
       quic_user_agent_id(quic_user_agent_id),
       enable_spdy(enable_spdy),
       enable_sdch(enable_sdch),
+      enable_brotli(enable_brotli),
       http_cache(http_cache),
       http_cache_max_size(http_cache_max_size),
       load_disable_cache(load_disable_cache),
@@ -445,9 +447,9 @@ URLRequestContextConfigBuilder::~URLRequestContextConfigBuilder() {}
 std::unique_ptr<URLRequestContextConfig>
 URLRequestContextConfigBuilder::Build() {
   return base::MakeUnique<URLRequestContextConfig>(
-      enable_quic, quic_user_agent_id, enable_spdy, enable_sdch, http_cache,
-      http_cache_max_size, load_disable_cache, storage_path, user_agent,
-      experimental_options, data_reduction_proxy_key,
+      enable_quic, quic_user_agent_id, enable_spdy, enable_sdch, enable_brotli,
+      http_cache, http_cache_max_size, load_disable_cache, storage_path,
+      user_agent, experimental_options, data_reduction_proxy_key,
       data_reduction_primary_proxy, data_reduction_fallback_proxy,
       data_reduction_secure_proxy_check_url, std::move(mock_cert_verifier),
       enable_network_quality_estimator,