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

android_webview/test/embedded_test_server/aw_embedded_test_server.h

Index: android_webview/test/embedded_test_server/aw_embedded_test_server.h
diff --git a/android_webview/test/embedded_test_server/aw_embedded_test_server.h b/android_webview/test/embedded_test_server/aw_embedded_test_server.h
new file mode 100644
index 0000000000000000000000000000000000000000..77fd9445cd49e3e9e594db809c3719103cc72baa
--- /dev/null
+++ b/android_webview/test/embedded_test_server/aw_embedded_test_server.h
@@ -0,0 +1,18 @@
+// Copyright 2017 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 ANDROID_WEBVIEW_TEST_EMBEDDED_TEST_SERVER_AW_EMBEDDED_TEST_SERVER_H_
+#define ANDROID_WEBVIEW_TEST_EMBEDDED_TEST_SERVER_AW_EMBEDDED_TEST_SERVER_H_
+
+#include <jni.h>
+
+namespace android_webview {
+namespace test {
+
+bool RegisterCustomHandlers(JNIEnv* env);
+
+}  // namespace test
+}  // namespace android_webview
+
+#endif  // ANDROID_WEBVIEW_TEST_EMBEDDED_TEST_SERVER_AW_EMBEDDED_TEST_SERVER_H_