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

net/test/embedded_test_server/android/embedded_test_server_android.h

Index: net/test/embedded_test_server/android/embedded_test_server_android.h
diff --git a/net/test/embedded_test_server/android/embedded_test_server_android.h b/net/test/embedded_test_server/android/embedded_test_server_android.h
index 1b73082997d98a166f24c3e03f353672af75566b..7f3b1bf4b07f7a8e4a76c1a7aee9b55d9562e39f 100644
--- a/net/test/embedded_test_server/android/embedded_test_server_android.h
+++ b/net/test/embedded_test_server/android/embedded_test_server_android.h
@@ -42,6 +42,14 @@ class EmbeddedTestServerAndroid {
       const base::android::JavaParamRef<jobject>& jobj,
       const base::android::JavaParamRef<jstring>& jdirectory_path);
 
+  base::android::ScopedJavaLocalRef<jlongArray> GetCustomHandlers(

[shenghuazhang, 2017/03/04 00:22:21]

Have to add GetCustomHandlers and RegisterRequestHandler here for JNI use, due
to IEmbeddedTestServerImpl.aidl and EmbeddedTestServerImpl.java requesting them.

+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& jobj);
+
+  void RegisterRequestHandler(JNIEnv* jenv,
+                              const base::android::JavaParamRef<jobject>& jobj,
+                              jlong handler);
+
   void ServeFilesFromDirectory(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& jobj,