Add Data Saver support to Cronet

components/cronet/android/test/native_test_server.cc

Index: components/cronet/android/test/native_test_server.cc
diff --git a/components/cronet/android/test/native_test_server.cc b/components/cronet/android/test/native_test_server.cc
index 97261645d361c60480eb00597df1b5e8b7c562b7..cc52b3034f9851d2a18dada7f620be7112a12972 100644
--- a/components/cronet/android/test/native_test_server.cc
+++ b/components/cronet/android/test/native_test_server.cc
@@ -12,6 +12,7 @@
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "jni/NativeTestServer_jni.h"
+#include "net/base/host_port_pair.h"
 #include "net/http/http_status_code.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/test/embedded_test_server/http_request.h"
@@ -144,6 +145,13 @@ jstring GetFileURL(JNIEnv* env, jclass jcaller, jstring jfile_path) {
   return base::android::ConvertUTF8ToJavaString(env, url.spec()).Release();
 }
 
+jstring GetHostPort(JNIEnv* env, jclass jcaller) {
+  DCHECK(g_test_server);
+  std::string host_port =
+      net::HostPortPair::FromURL(g_test_server->base_url()).ToString();
+  return base::android::ConvertUTF8ToJavaString(env, host_port).Release();
+}
+
 bool RegisterNativeTestServer(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }