Move DevTools out of ash and turn it to a component.

components/ui_devtools/devtools_server.h

 // 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.
 
 #ifndef COMPONENTS_UI_DEVTOOLS_DEVTOOLS_SERVER_H_
 #define COMPONENTS_UI_DEVTOOLS_DEVTOOLS_SERVER_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 #include "components/ui_devtools/DOM.h"
 #include "components/ui_devtools/Forward.h"
 #include "components/ui_devtools/Protocol.h"
 #include "components/ui_devtools/devtools_client.h"
+#include "components/ui_devtools/devtools_export.h"
 #include "components/ui_devtools/string_util.h"
 #include "net/server/http_server.h"
 
-namespace ui {
-namespace devtools {
+namespace ui_devtools {
 
-class UiDevToolsServer : public net::HttpServer::Delegate {
+class UI_DEVTOOLS_EXPORT UiDevToolsServer
+    : public NON_EXPORTED_BASE(net::HttpServer::Delegate) {
  public:
   ~UiDevToolsServer() override;
 
   // Returns an empty unique_ptr if ui devtools flag isn't enabled or if a
   // server instance has already been created.
   static std::unique_ptr<UiDevToolsServer> Create(
       scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner);
 
   // Returns a list of attached UiDevToolsClient name + URL
   using NameUrlPair = std::pair<std::string, std::string>;
@@ skipping 27 matching lines @@
   std::unique_ptr<net::HttpServer> server_;
   scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
 
   // The server (owned by ash for now)
   static UiDevToolsServer* devtools_server_;
 
   DISALLOW_COPY_AND_ASSIGN(UiDevToolsServer);
 };
 
-}  // namespace devtools
-}  // namespace ui
+}  // namespace ui_devtools
 
 #endif  // COMPONENTS_UI_DEVTOOLS_DEVTOOLS_SERVER_H_