Put Data Reduction Proxy support in Cronet behind a gyp flag

components/cronet/android/test/native_test_server.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "native_test_server.h"
 
 #include <string>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 288 matching lines @@
   return base::android::ConvertUTF8ToJavaString(env, url).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();
 }
 
+jboolean IsDataReductionProxySupported(JNIEnv* env, jclass jcaller) {
+#if defined(DATA_REDUCTION_PROXY_SUPPORT)
+  return JNI_TRUE;
+#else
+  return JNI_FALSE;
+#endif
+}
+
 bool RegisterNativeTestServer(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace cronet