Minimize headless code that refers to aura.

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.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace headless {
 namespace {
 
@@ skipping 82 matching lines @@
   return browser_main_parts_;
 }
 
 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(
-      new HeadlessWindowTreeHost(gfx::Rect(options()->window_size)));
-  window_tree_host_->InitHost();
-  window_tree_host_->window()->Show();
-
-  window_parenting_client_.reset(
-      new HeadlessWindowParentingClient(window_tree_host_->window()));
-
+  PlatformCreateWindow();
   on_start_callback_.Run(this);
   on_start_callback_ = base::Callback<void(HeadlessBrowser*)>();
 }
 
 HeadlessBrowserContext* HeadlessBrowserImpl::CreateBrowserContext(
     HeadlessBrowserContext::Builder* builder) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   std::unique_ptr<HeadlessBrowserContextImpl> browser_context =
       HeadlessBrowserContextImpl::Create(builder);
@@ skipping 27 matching lines @@
 
 HeadlessBrowserContext* HeadlessBrowserImpl::GetDefaultBrowserContext() {
   return default_browser_context_;
 }
 
 base::WeakPtr<HeadlessBrowserImpl> HeadlessBrowserImpl::GetWeakPtr() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   return weak_ptr_factory_.GetWeakPtr();
 }
 
-aura::WindowTreeHost* HeadlessBrowserImpl::window_tree_host() const {
+HeadlessWindowTreeHost* HeadlessBrowserImpl::window_tree_host() const {
   return window_tree_host_.get();
 }
 
 HeadlessWebContents* HeadlessBrowserImpl::GetWebContentsForDevToolsAgentHostId(
     const std::string& devtools_agent_host_id) {
   for (HeadlessBrowserContext* context : GetAllBrowserContexts()) {
     HeadlessWebContents* web_contents =
         context->GetWebContentsForDevToolsAgentHostId(devtools_agent_host_id);
     if (web_contents)
       return web_contents;
@@ skipping 31 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