[Extensions] DCHECK that ExtensionFunctions respond (and only once)

extensions/browser/api_test_utils.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_utils.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/callback_helpers.h"
@@ skipping 216 matching lines @@
     RunFunctionFlags flags) {
   SendResponseDelegate response_delegate;
   function->set_test_delegate(&response_delegate);
   function->SetArgs(args.get());
 
   CHECK(dispatcher);
   function->set_dispatcher(dispatcher->AsWeakPtr());
 
   function->set_browser_context(context);
   function->set_include_incognito(flags & INCLUDE_INCOGNITO);
-  function->Run()->Execute();
+  function->RunWithValidation()->Execute();
   response_delegate.WaitForResponse();
 
   EXPECT_TRUE(response_delegate.HasResponse());
   return response_delegate.GetResponse();
 }
 
 }  // namespace api_test_utils
 }  // namespace extensions