DevTools: introduce browser domain for basic target discovery.

content/browser/devtools/devtools_agent_host_impl.h

 // Copyright (c) 2012 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_DEVTOOLS_AGENT_HOST_IMPL_H_
 #define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_AGENT_HOST_IMPL_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 20 matching lines @@
   // Informs the hosted agent that a client host has attached.
   virtual void Attach() = 0;
 
   // Informs the hosted agent that a client host has detached.
   virtual void Detach() = 0;
 
   // Opens the inspector for this host.
   bool Inspect(BrowserContext* browser_context);
 
   // DevToolsAgentHost implementation.
-  void AttachClient(DevToolsAgentHostClient* client) override;
-  void DetachClient() override;
+  bool AttachClient(DevToolsAgentHostClient* client) override;
+  bool ForceAttachClient(DevToolsAgentHostClient* client) override;
+  bool DetachClient(DevToolsAgentHostClient* client) override;
   bool IsAttached() override;
   void InspectElement(int x, int y) override;
   std::string GetId() override;
   BrowserContext* GetBrowserContext() override;
   WebContents* GetWebContents() override;
   void DisconnectWebContents() override;
   void ConnectWebContents(WebContents* wc) override;
 
   // DevToolsProtocolDelegate implementation.
   void SendProtocolResponse(int session_id,
                             const std::string& message) override;
   void SendProtocolNotification(const std::string& message) override;
 
  protected:
   DevToolsAgentHostImpl();
   ~DevToolsAgentHostImpl() override;
 
   void HostClosed();
   void SendMessageToClient(int session_id, const std::string& message);
   devtools::DevToolsIOContext* GetIOContext() { return &io_context_; }
 
   int session_id() { DCHECK(client_); return session_id_; }
 
   static void NotifyCallbacks(DevToolsAgentHostImpl* agent_host, bool attached);
 
  private:
   friend class DevToolsAgentHost; // for static methods
+  bool InnerAttach(DevToolsAgentHostClient* client, bool force);
   void InnerDetach();
 
   const std::string id_;
   int session_id_;
   DevToolsAgentHostClient* client_;
   devtools::DevToolsIOContext io_context_;
 };
 
 class DevToolsMessageChunkProcessor {
  public:
@@ skipping 10 matching lines @@
   SendMessageCallback callback_;
   std::string message_buffer_;
   uint32_t message_buffer_size_;
   std::string state_cookie_;
   int last_call_id_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_AGENT_HOST_IMPL_H_