[DevTools] Rework DevToolsSession interaction with domain handlers.

content/browser/devtools/worker_devtools_agent_host.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_WORKER_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_AGENT_HOST_H_
 
 #include "base/macros.h"
 #include "content/browser/devtools/devtools_agent_host_impl.h"
 #include "ipc/ipc_listener.h"
 
 namespace content {
 
-namespace protocol {
-class InspectorHandler;
-class NetworkHandler;
-class SchemaHandler;
-}
-
 class BrowserContext;
 
 class WorkerDevToolsAgentHost : public DevToolsAgentHostImpl,
                                 public IPC::Listener {
  public:
   typedef std::pair<int, int> WorkerId;
 
   // DevToolsAgentHost override.
   BrowserContext* GetBrowserContext() override;
-  bool DispatchProtocolMessage(const std::string& message) override;
 
   // DevToolsAgentHostImpl overrides.
-  void Attach() override;
-  void Detach() override;
+  void AttachSession(DevToolsSession* session) override;
+  void DetachSession(int session_id) override;
+  bool DispatchProtocolMessage(
+      DevToolsSession* session,
+      const std::string& message) override;
 
   // IPC::Listener implementation.
   bool OnMessageReceived(const IPC::Message& msg) override;
 
   void PauseForDebugOnStart();
   bool IsPausedForDebugOnStart();
 
   void WorkerReadyForInspection();
   void WorkerRestarted(WorkerId worker_id);
   void WorkerDestroyed();
@@ skipping 15 matching lines @@
   const WorkerId& worker_id() const { return worker_id_; }
 
  private:
   friend class SharedWorkerDevToolsManagerTest;
 
   void AttachToWorker();
   void DetachFromWorker();
   void WorkerCreated();
   void OnDispatchOnInspectorFrontend(const DevToolsMessageChunk& message);
 
-  std::unique_ptr<protocol::InspectorHandler> inspector_handler_;
-  std::unique_ptr<protocol::NetworkHandler> network_handler_;
-  std::unique_ptr<protocol::SchemaHandler> schema_handler_;
   DevToolsMessageChunkProcessor chunk_processor_;
   WorkerState state_;
   WorkerId worker_id_;
   DISALLOW_COPY_AND_ASSIGN(WorkerDevToolsAgentHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_AGENT_HOST_H_