Fixing trybot failure

athena/test/chrome/athena_app_browsertest.h

 // 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.
 
 #ifndef ATHENA_TEST_CHROME_ATHENA_APP_BROWSERTEST_H_
 #define ATHENA_TEST_CHROME_ATHENA_APP_BROWSERTEST_H_
 
 #include "chrome/browser/apps/app_browsertest_util.h"
 
 namespace athena {
 class Activity;
 
 // Base class for athena tests.
 //
 // Note: To avoid asynchronous resource manager events, the memory pressure
 // callback gets turned off at the beginning to a low memory pressure.
 class AthenaAppBrowserTest : public extensions::PlatformAppBrowserTest {
  public:
   AthenaAppBrowserTest();
   ~AthenaAppBrowserTest() override;
 
+  // extensions::PlatformAppBrowserTest:
+  void SetUpCommandLine(base::CommandLine* command_line) override;
+
  protected:
   // Creates an app activity and returns after app is fully loaded.
   Activity* CreateTestAppActivity(const std::string app_id);
 
   // Gets an application ID for an installed test application.
   const std::string& GetTestAppID();
 
   // BrowserTestBase:
   void SetUpOnMainThread() override;
 
  private:
   // Our created app id - after it got created and installed.
   std::string app_id_;
 
   DISALLOW_COPY_AND_ASSIGN(AthenaAppBrowserTest);
 };
 
 }  // namespace athena
 
 #endif //  ATHENA_TEST_CHROME_ATHENA_APP_BROWSERTEST_H_