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

android_webview/test/embedded_test_server/aw_test_jni_onload.h

Index: android_webview/test/embedded_test_server/aw_test_jni_onload.h
diff --git a/android_webview/test/embedded_test_server/aw_test_jni_onload.h b/android_webview/test/embedded_test_server/aw_test_jni_onload.h
new file mode 100644
index 0000000000000000000000000000000000000000..419377919c50cb99338f9b85c7ffc62a01178e87
--- /dev/null
+++ b/android_webview/test/embedded_test_server/aw_test_jni_onload.h
@@ -0,0 +1,19 @@
+// 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_TEST_JNI_ONLOAD_H_
+#define ANDROID_WEBVIEW_TEST_EMBEDDED_TEST_SERVER_AW_TEST_JNI_ONLOAD_H_
+
+#include <jni.h>
+
+namespace android_webview {
+namespace test {
+
+bool OnJNIOnLoadRegisterJNI(JNIEnv* env);
+bool OnJNIOnLoadInit();
+
+}  // namespace test
+}  // namespace android_webview
+
+#endif  // ANDROID_WEBVIEW_TEST_EMBEDDED_TEST_SERVER_AW_TEST_JNI_ONLOAD_H_