Add Data Saver support to Cronet

components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.cc
index 4009c211e909a7e23f5764ca9f420c1391e632b3..7c504aed9512736a3eb79ef6714836f367d5009a 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.cc
@@ -68,6 +68,10 @@ void DataReductionProxyConfigurator::Enable(
   data_reduction_proxy_event_store_->AddProxyEnabledEvent(
       net_log_, primary_restricted, fallback_restricted, primary_origin,
       fallback_origin, ssl_origin);
+  if (network_task_runner_->RunsTasksOnCurrentThread()) {
+    UpdateProxyConfigOnIOThread(config);
+    return;
+  }
   network_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(
@@ -79,6 +83,11 @@ void DataReductionProxyConfigurator::Enable(
 void DataReductionProxyConfigurator::Disable() {
   net::ProxyConfig config = net::ProxyConfig::CreateDirect();
   data_reduction_proxy_event_store_->AddProxyDisabledEvent(net_log_);
+
+  if (network_task_runner_->RunsTasksOnCurrentThread()) {
+    UpdateProxyConfigOnIOThread(config);
+    return;
+  }
   network_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(