DevTools: allow reattaching main target live.

chrome/browser/devtools/devtools_embedder_message_dispatcher.h

 // Copyright 2013 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 CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 70 matching lines @@
     virtual void RemovePreference(const std::string& name) = 0;
     virtual void ClearPreferences() = 0;
     virtual void DispatchProtocolMessageFromDevToolsFrontend(
         const std::string& message) = 0;
     virtual void RecordEnumeratedHistogram(const std::string& name,
                                            int sample,
                                            int boundary_value) = 0;
     virtual void SendJsonRequest(const DispatchCallback& callback,
                                  const std::string& browser_id,
                                  const std::string& url) = 0;
+    virtual void Reattach(const DispatchCallback& callback) = 0;
     virtual void ReadyForTest() = 0;
   };
 
   using DispatchCallback = Delegate::DispatchCallback;
 
   virtual ~DevToolsEmbedderMessageDispatcher() {}
   virtual bool Dispatch(const DispatchCallback& callback,
                         const std::string& method,
                         const base::ListValue* params) = 0;
 
   static DevToolsEmbedderMessageDispatcher* CreateForDevToolsFrontend(
       Delegate* delegate);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_