Reland of r114615: "chrome.clear: Increasing granularity of public API"

chrome/browser/extensions/extension_function_test_utils.cc

 // Copyright (c) 2011 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 "chrome/browser/extensions/extension_function_test_utils.h"
 
 #include <string>
 
 #include "base/file_path.h"
 #include "base/json/json_reader.h"
@@ skipping 120 matching lines @@
   return RunFunctionAndReturnResult(function, args, browser, NONE);
 }
 base::Value* RunFunctionAndReturnResult(UIThreadExtensionFunction* function,
                                         const std::string& args,
                                         Browser* browser,
                                         RunFunctionFlags flags) {
   scoped_refptr<ExtensionFunction> function_owner(function);
   RunFunction(function, args, browser, flags);
   EXPECT_TRUE(function->GetError().empty()) << "Unexpected error: "
       << function->GetError();
-  EXPECT_TRUE(function->GetResultValue()) << "No result value found";
-  return function->GetResultValue()->DeepCopy();
+  return (function->GetResultValue() == NULL) ? NULL :
+      function->GetResultValue()->DeepCopy();
 }
 
 // This helps us be able to wait until an AsyncExtensionFunction calls
 // SendResponse.
 class SendResponseDelegate
     : public UIThreadExtensionFunction::DelegateForTests {
  public:
   SendResponseDelegate() : should_post_quit_(false) {}
 
   virtual ~SendResponseDelegate() {}
@@ skipping 51 matching lines @@
   if (!response_delegate.HasResponse()) {
     response_delegate.set_should_post_quit(true);
     ui_test_utils::RunMessageLoop();
   }
 
   EXPECT_TRUE(response_delegate.HasResponse());
   return response_delegate.GetResponse();
 }
 
 } // namespace extension_function_test_utils