headless: Make HeadlessBrowser::Options move-only

headless/test/headless_browser_test.h

 // Copyright 2016 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 HEADLESS_TEST_HEADLESS_BROWSER_TEST_H_
 #define HEADLESS_TEST_HEADLESS_BROWSER_TEST_H_
 
 #include <memory>
 #include "content/public/test/browser_test_base.h"
 #include "headless/public/headless_browser.h"
@@ skipping 17 matching lines @@
   ~HeadlessBrowserTest() override;
 
   // BrowserTestBase:
   void RunTestOnMainThreadLoop() override;
   void SetUpOnMainThread() override;
   void TearDownOnMainThread() override;
 
   // Customize the options used in this test. Note that options which take
   // effect before the message loop has been started (e.g., custom message
   // pumps) cannot be set via this method.
-  void SetBrowserOptions(const HeadlessBrowser::Options& options);
+  void SetBrowserOptions(HeadlessBrowser::Options options);
 
   // Run an asynchronous test in a nested run loop. The caller should call
   // FinishAsynchronousTest() to notify that the test should finish.
   void RunAsynchronousTest();
 
   // Synchronously waits for a tab to finish loading.
   bool WaitForLoad(HeadlessWebContents* web_contents);
 
  protected:
   // Returns the browser for the test.
   HeadlessBrowser* browser() const;
 
  private:
   std::unique_ptr<base::RunLoop> run_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserTest);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_TEST_HEADLESS_BROWSER_TEST_H_