headless: Make HeadlessBrowser::Options move-only

headless/lib/browser/headless_browser_impl.h

 // Copyright 2015 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_LIB_BROWSER_HEADLESS_BROWSER_IMPL_H_
 #define HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_IMPL_H_
 
 #include "headless/public/headless_browser.h"
 
 #include <memory>
@@ skipping 12 matching lines @@
 
 namespace headless {
 
 class HeadlessBrowserContext;
 class HeadlessBrowserMainParts;
 
 class HeadlessBrowserImpl : public HeadlessBrowser {
  public:
   HeadlessBrowserImpl(
       const base::Callback<void(HeadlessBrowser*)>& on_start_callback,
-      const HeadlessBrowser::Options& options);
+      HeadlessBrowser::Options options);
   ~HeadlessBrowserImpl() override;
 
   // HeadlessBrowser implementation:
   HeadlessWebContents* CreateWebContents(const GURL& initial_url,
                                          const gfx::Size& size) override;
   scoped_refptr<base::SingleThreadTaskRunner> BrowserMainThread()
       const override;
 
   void Shutdown() override;
 
   std::vector<HeadlessWebContents*> GetAllWebContents() override;
 
   void set_browser_main_parts(HeadlessBrowserMainParts* browser_main_parts);
   HeadlessBrowserMainParts* browser_main_parts() const;
 
   HeadlessBrowserContext* browser_context() const;
 
   void RunOnStartCallback();
 
-  const HeadlessBrowser::Options& options() const { return options_; }
+  HeadlessBrowser::Options* options() { return &options_; }
 
   HeadlessWebContentsImpl* RegisterWebContents(
       std::unique_ptr<HeadlessWebContentsImpl> web_contents);
 
   // Close given |web_contents| and delete it.
   void DestroyWebContents(HeadlessWebContentsImpl* web_contents);
 
   // Customize the options used by this headless browser instance. 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 SetOptionsForTesting(const HeadlessBrowser::Options& options);
+  void SetOptionsForTesting(HeadlessBrowser::Options options);
 
  protected:
   base::Callback<void(HeadlessBrowser*)> on_start_callback_;
   HeadlessBrowser::Options options_;
   HeadlessBrowserMainParts* browser_main_parts_;  // Not owned.
   std::unique_ptr<aura::WindowTreeHost> window_tree_host_;
   std::unique_ptr<aura::client::WindowTreeClient> window_tree_client_;
 
   std::unordered_map<HeadlessWebContents*, std::unique_ptr<HeadlessWebContents>>
       web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserImpl);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_IMPL_H_