Allow extension APIs to be called from WebUI.

extensions/browser/api/test/test_api.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 "extensions/browser/api/test/test_api.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/memory/singleton.h"
@@ skipping 86 matching lines @@
   return true;
 }
 
 TestSendMessageFunction::~TestSendMessageFunction() {}
 
 void TestSendMessageFunction::Reply(const std::string& message) {
   SetResult(new base::StringValue(message));
   SendResponse(true);
 }
 
+void TestSendMessageFunction::ReplyWithError(const std::string& error) {
+  error_ = error;
+  SendResponse(false);
+}
+
 // static
 void TestGetConfigFunction::set_test_config_state(
     base::DictionaryValue* value) {
   TestConfigState* test_config_state = TestConfigState::GetInstance();
   test_config_state->set_config_state(value);
 }
 
 TestGetConfigFunction::TestConfigState::TestConfigState()
     : config_state_(NULL) {}
 
@@ skipping 20 matching lines @@
 TestWaitForRoundTripFunction::~TestWaitForRoundTripFunction() {}
 
 bool TestWaitForRoundTripFunction::RunSafe() {
   scoped_ptr<WaitForRoundTrip::Params> params(
       WaitForRoundTrip::Params::Create(*args_));
   SetResult(new base::StringValue(params->message));
   return true;
 }
 
 }  // namespace extensions