Implement window management devtools commands for headless.

headless/lib/browser/headless_browser_context_options.cc

 // 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.
 
 #include "headless/lib/browser/headless_browser_context_options.h"
 
 #include <string>
 #include <utility>
 
 namespace headless {
@@ skipping 40 matching lines @@
 
 const std::string& HeadlessBrowserContextOptions::host_resolver_rules() const {
   return ReturnOverriddenValue(host_resolver_rules_,
                                browser_options_->host_resolver_rules);
 }
 
 const gfx::Size& HeadlessBrowserContextOptions::window_size() const {
   return ReturnOverriddenValue(window_size_, browser_options_->window_size);
 }
 
+const gfx::Size& HeadlessBrowserContextOptions::screen_size() const {
+  return browser_options_->screen_size;
+}
+
 const base::FilePath& HeadlessBrowserContextOptions::user_data_dir() const {
   return ReturnOverriddenValue(user_data_dir_, browser_options_->user_data_dir);
 }
 
 bool HeadlessBrowserContextOptions::incognito_mode() const {
   return ReturnOverriddenValue(incognito_mode_,
                                browser_options_->incognito_mode);
 }
 
 const base::Callback<void(WebPreferences*)>&
 HeadlessBrowserContextOptions::override_web_preferences_callback() const {
   return ReturnOverriddenValue(
       override_web_preferences_callback_,
       browser_options_->override_web_preferences_callback);
 }
 
 const ProtocolHandlerMap& HeadlessBrowserContextOptions::protocol_handlers()
     const {
   return protocol_handlers_;
 }
 
 ProtocolHandlerMap HeadlessBrowserContextOptions::TakeProtocolHandlers() {
   return std::move(protocol_handlers_);
 }
 
 }  // namespace headless