Implement a runtime headless mode for Linux

headless/lib/browser/headless_browser_impl.cc

 // 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.
 
 #include "headless/lib/browser/headless_browser_impl.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/public/app/content_main.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_switches.h"
 #include "headless/lib/browser/headless_browser_context_impl.h"
 #include "headless/lib/browser/headless_browser_main_parts.h"
 #include "headless/lib/browser/headless_web_contents_impl.h"
 #include "headless/lib/browser/headless_window_parenting_client.h"
+#include "headless/lib/browser/headless_window_tree_host.h"
 #include "headless/lib/headless_content_main_delegate.h"
 #include "ui/aura/env.h"
-#include "ui/aura/window_tree_host.h"
+#include "ui/events/devices/device_data_manager.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace headless {
 namespace {
 
 int RunContentMain(
     HeadlessBrowser::Options options,
     const base::Callback<void(HeadlessBrowser*)>& on_browser_start_callback) {
   content::ContentMainParams params(nullptr);
   params.argc = options.argc;
@@ skipping 77 matching lines @@
 }
 
 void HeadlessBrowserImpl::set_browser_main_parts(
     HeadlessBrowserMainParts* browser_main_parts) {
   DCHECK(!browser_main_parts_);
   browser_main_parts_ = browser_main_parts;
 }
 
 void HeadlessBrowserImpl::RunOnStartCallback() {
   DCHECK(aura::Env::GetInstance());
+  ui::DeviceDataManager::CreateInstance();
+
   window_tree_host_.reset(
-      aura::WindowTreeHost::Create(gfx::Rect(options()->window_size)));
+      new HeadlessWindowTreeHost(gfx::Rect(options()->window_size)));
   window_tree_host_->InitHost();
 
   window_parenting_client_.reset(
       new HeadlessWindowParentingClient(window_tree_host_->window()));
 
   on_start_callback_.Run(this);
   on_start_callback_ = base::Callback<void(HeadlessBrowser*)>();
 }
 
 HeadlessBrowserContext* HeadlessBrowserImpl::CreateBrowserContext(
@@ skipping 71 matching lines @@
 
   // Child processes should not end up here.
   base::CommandLine command_line(options.argc, options.argv);
   DCHECK(!command_line.HasSwitch(switches::kProcessType));
 #endif
   return RunContentMain(std::move(options),
                         std::move(on_browser_start_callback));
 }
 
 }  // namespace headless