[Extensions] Remove UIThreadExtensionFunction::DelegateForTests

chrome/browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_api_unittest.cc

Index: chrome/browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_api_unittest.cc
diff --git a/chrome/browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_api_unittest.cc b/chrome/browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_api_unittest.cc
index 68d0a23a1f4e1d7e104c37b13ba7f62b6503af3e..1e4ce69819540db93e42f1e59a8f64d602d1f005 100644
--- a/chrome/browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_api_unittest.cc
+++ b/chrome/browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_api_unittest.cc
@@ -210,11 +210,8 @@ class EPKChallengeKeyTestBase : public BrowserWithTestWindowTest {
   std::string RunFunctionAndReturnError(UIThreadExtensionFunction* function,
                                         std::unique_ptr<base::ListValue> args,
                                         Browser* browser) {
-    scoped_refptr<ExtensionFunction> function_owner(function);
-    // Without a callback the function will not generate a result.
-    function->set_has_callback(true);
     utils::RunFunction(function, std::move(args), browser, utils::NONE);
-    EXPECT_FALSE(function->GetResultList()) << "Did not expect a result";
+    EXPECT_EQ(ExtensionFunction::FAILED, *function->response());
     return function->GetError();
   }