[DevTools] Rework DevToolsSession interaction with domain handlers.

content/browser/devtools/protocol/tethering_handler.h

 // Copyright 2014 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 CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TETHERING_HANDLER_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TETHERING_HANDLER_H_
 
 #include <stdint.h>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
+#include "content/browser/devtools/protocol/devtools_domain_handler.h"
 #include "content/browser/devtools/protocol/tethering.h"
 
 namespace net {
 class ServerSocket;
 }
 
 namespace content {
 namespace protocol {
 
 // This class implements reversed tethering handler.
-class TetheringHandler : public Tethering::Backend {
+class TetheringHandler : public DevToolsDomainHandler,
+                         public Tethering::Backend {
  public:
   using CreateServerSocketCallback =
       base::Callback<std::unique_ptr<net::ServerSocket>(std::string*)>;
 
   TetheringHandler(const CreateServerSocketCallback& socket_callback,
                    scoped_refptr<base::SingleThreadTaskRunner> task_runner);
   ~TetheringHandler() override;
 
-  void Wire(UberDispatcher*);
+  void Wire(UberDispatcher* dispatcher) override;
+  void SetRenderFrameHost(RenderFrameHostImpl* host) override;
   Response Disable() override;
 
   void Bind(int port, std::unique_ptr<BindCallback> callback) override;
   void Unbind(int port, std::unique_ptr<UnbindCallback> callback) override;
 
  private:
   class TetheringImpl;
 
   void Accepted(uint16_t port, const std::string& name);
   bool Activate();
 
   std::unique_ptr<Tethering::Frontend> frontend_;
   CreateServerSocketCallback socket_callback_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   bool is_active_;
   base::WeakPtrFactory<TetheringHandler> weak_factory_;
 
   static TetheringImpl* impl_;
 
   DISALLOW_COPY_AND_ASSIGN(TetheringHandler);
 };
 
 }  // namespace protocol
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_TETHERING_HANDLER_H_