[Extensions Bindings] Include request id in a custom callback response

extensions/renderer/api_bindings_system_unittest.cc

 // Copyright 2016 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 "extensions/renderer/api_bindings_system.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
@@ skipping 278 matching lines @@
     EXPECT_EQ(ReplaceSingleQuotes(kResponseArgsJson),
               GetStringPropertyFromObject(context->Global(), context,
                                           "eventArguments"));
   }
 
   {
     // Test a call -> response on the second API.
     const char kTestCall[] = "obj.simpleFunc(2)";
     CallFunctionOnObject(context, beta_api, kTestCall);
     ValidateLastRequest("beta.simpleFunc", "[2]");
-    EXPECT_EQ(-1, last_request()->request_id);
     reset_last_request();
   }
 }
 
 // Tests adding a custom hook to an API.
 TEST_F(APIBindingsSystemTest, TestCustomHooks) {
   v8::HandleScope handle_scope(isolate());
   v8::Local<v8::Context> context = MainContext();
 
   bool did_call = false;
@@ skipping 160 matching lines @@
   v8::Local<v8::Value> other_event =
       GetPropertyFromObject(api, context, "alphaOtherEvent");
   ASSERT_TRUE(other_event->IsObject());
   EXPECT_EQ("\"alpha.alphaOtherEvent\"",
             GetStringPropertyFromObject(other_event.As<v8::Object>(), context,
                                         "name"));
   EXPECT_NE(event, other_event);
 }
 
 }  // namespace extensions