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

components/ui_devtools/devtools_client.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_CLIENT_H_
 #define COMPONENTS_UI_DEVTOOLS_DEVTOOLS_CLIENT_H_
 
 #include <string>
 
 #include "components/ui_devtools/DOM.h"
 #include "components/ui_devtools/Forward.h"
 #include "components/ui_devtools/Protocol.h"
 #include "components/ui_devtools/devtools_base_agent.h"
+#include "components/ui_devtools/devtools_export.h"
 
-namespace ui {
-namespace devtools {
+namespace ui_devtools {
 
 class UiDevToolsServer;
 
 // Every UI component that wants to be inspectable must instantiate
 // this class and attach the corresponding backends/frontends (i.e: DOM, CSS,
 // etc). This client is then attached to the UiDevToolsServer and all messages
 // from this client are sent over the web socket owned by the server.
-class UiDevToolsClient : public protocol::FrontendChannel {
+class UI_DEVTOOLS_EXPORT UiDevToolsClient : public protocol::FrontendChannel {
  public:
   static const int kNotConnected = -1;
 
   UiDevToolsClient(const std::string& name, UiDevToolsServer* server);
   ~UiDevToolsClient() override;
 
   void AddAgent(std::unique_ptr<UiDevToolsAgent> agent);
   void Disconnect();
   void Dispatch(const std::string& data);
 
@@ skipping 15 matching lines @@
   std::string name_;
   int connection_id_;
 
   std::vector<std::unique_ptr<UiDevToolsAgent>> agents_;
   protocol::UberDispatcher dispatcher_;
   UiDevToolsServer* server_;
 
   DISALLOW_COPY_AND_ASSIGN(UiDevToolsClient);
 };
 
-}  // namespace devtools
-}  // namespace ui
+}  // namespace ui_devtools
 
 #endif  // COMPONENTS_UI_DEVTOOLS_DEVTOOLS_CLIENT_H_