headless: Make HeadlessBrowser::Options move-only

headless/public/headless_browser.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_PUBLIC_HEADLESS_BROWSER_H_
 #define HEADLESS_PUBLIC_HEADLESS_BROWSER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 45 matching lines @@
  protected:
   HeadlessBrowser() {}
   virtual ~HeadlessBrowser() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HeadlessBrowser);
 };
 
 // Embedding API overrides for the headless browser.
 struct HeadlessBrowser::Options {
-  Options(const Options& other);
+  class Builder;
+
+  Options(Options&& options);
   ~Options();
 
-  class Builder;
+  Options& operator=(Options&& options);
 
   // Command line options to be passed to browser.
   int argc;
   const char** argv;
 
   std::string user_agent;
   std::string navigator_platform;
 
   // Address at which DevTools should listen for connections. Disabled by
   // default.
@@ skipping 10 matching lines @@
   // chrome::switches::kHostRules for a description for the format.
   std::string host_resolver_rules;
 
   // Run the browser in single process mode instead of using separate renderer
   // processes as per default. Note that this also disables any sandboxing of
   // web content, which can be a security risk.
   bool single_process_mode;
 
  private:
   Options(int argc, const char** argv);
+
+  DISALLOW_COPY_AND_ASSIGN(Options);
 };
 
 class HeadlessBrowser::Options::Builder {
  public:
   Builder(int argc, const char** argv);
   Builder();
   ~Builder();
 
   Builder& SetUserAgent(const std::string& user_agent);
   Builder& EnableDevToolsServer(const net::IPEndPoint& endpoint);
   Builder& SetMessagePump(base::MessagePump* message_pump);
   Builder& SetProxyServer(const net::HostPortPair& proxy_server);
   Builder& SetHostResolverRules(const std::string& host_resolver_rules);
   Builder& SetSingleProcessMode(bool single_process_mode);
 
   Options Build();
 
  private:
   Options options_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 // Main entry point for running the headless browser. This function constructs
 // the headless browser instance, passing it to the given
 // |on_browser_start_callback| callback. Note that since this function executes
 // the main loop, it will only return after HeadlessBrowser::Shutdown() is
 // called, returning the exit code for the process.
 int HeadlessBrowserMain(
-    const HeadlessBrowser::Options& options,
+    HeadlessBrowser::Options options,
     const base::Callback<void(HeadlessBrowser*)>& on_browser_start_callback);
 
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_HEADLESS_BROWSER_H_