[Android Webview] Refactor LoadUrlTest and work on embedded_test_server custom handler

net/test/embedded_test_server/android/embedded_test_server_android.h

 // Copyright 2015 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.
 
 #ifndef NET_TEST_EMBEDDED_TEST_SERVER_ANDROID_EMBEDDED_TEST_SERVER_ANDROID_H_
 #define NET_TEST_EMBEDDED_TEST_SERVER_ANDROID_EMBEDDED_TEST_SERVER_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/jni_weak_ref.h"
@@ skipping 24 matching lines @@
   base::android::ScopedJavaLocalRef<jstring> GetURL(
       JNIEnv* jenv,
       const base::android::JavaParamRef<jobject>& jobj,
       const base::android::JavaParamRef<jstring>& jrelative_url) const;
 
   void AddDefaultHandlers(
       JNIEnv* jenv,
       const base::android::JavaParamRef<jobject>& jobj,
       const base::android::JavaParamRef<jstring>& jdirectory_path);
 
+  void RegisterRequestHandler(JNIEnv* jenv,
+                              const base::android::JavaParamRef<jobject>& jobj,
+                              jlong handler);
+
   void ServeFilesFromDirectory(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& jobj,
       const base::android::JavaParamRef<jstring>& jdirectory_path);
 
   static bool RegisterEmbeddedTestServerAndroid(JNIEnv* env);
 
  private:
   JavaObjectWeakGlobalRef weak_java_server_;
 
   EmbeddedTestServer test_server_;
 
   DISALLOW_COPY_AND_ASSIGN(EmbeddedTestServerAndroid);
 };
 
 }  // namespace test_server
 }  // namespace net
 
 #endif  // NET_TEST_EMBEDDED_TEST_SERVER_ANDROID_EMBEDDED_TEST_SERVER_ANDROID_H_