[Android] Java Bridge with Gin: implement Java Bridge dispatcher

content/renderer/java/gin_java_bridge_dispatcher.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 "content/renderer/java/gin_java_bridge_dispatcher.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/common/gin_java_bridge_messages.h"
 #include "content/public/renderer/render_frame.h"
@@ skipping 96 matching lines @@
                                             const std::string& method_name) {
   bool result;
   render_frame()->Send(new GinJavaBridgeHostMsg_HasMethod(
       routing_id(), object_id, method_name, &result));
   return result;
 }
 
 scoped_ptr<base::Value> GinJavaBridgeDispatcher::InvokeJavaMethod(
     ObjectID object_id,
     const std::string& method_name,
-    const base::ListValue& arguments) {
+    const base::ListValue& arguments,
+    std::string* error_message) {
   base::ListValue result_wrapper;
   render_frame()->Send(
       new GinJavaBridgeHostMsg_InvokeMethod(routing_id(),
                                             object_id,
                                             method_name,
                                             arguments,
-                                            &result_wrapper));
+                                            &result_wrapper,
+                                            error_message));
   base::Value* result;
   if (result_wrapper.Get(0, &result)) {
     return scoped_ptr<base::Value>(result->DeepCopy());
   } else {
     return scoped_ptr<base::Value>();
   }
 }
 
 GinJavaBridgeObject* GinJavaBridgeDispatcher::GetObject(ObjectID object_id) {
   GinJavaBridgeObject* result = objects_.Lookup(object_id);
   if (!result) {
     result = GinJavaBridgeObject::InjectAnonymous(AsWeakPtr(), object_id);
     if (result)
       objects_.AddWithID(result, object_id);
   }
   return result;
 }
 
 void GinJavaBridgeDispatcher::OnGinJavaBridgeObjectDeleted(ObjectID object_id) {
   if (!objects_.Lookup(object_id))
     return;
   objects_.Remove(object_id);
   render_frame()->Send(
       new GinJavaBridgeHostMsg_ObjectWrapperDeleted(routing_id(), object_id));
 }
 
 }  // namespace content