[inspector] Support multiple sessions per context group

src/inspector/v8-inspector-impl.h

 /*
  * Copyright (c) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 86 matching lines @@
 
   unsigned nextExceptionId() { return ++m_lastExceptionId; }
   void enableStackCapturingIfNeeded();
   void disableStackCapturingIfNeeded();
   void muteExceptions(int contextGroupId);
   void unmuteExceptions(int contextGroupId);
   V8ConsoleMessageStorage* ensureConsoleMessageStorage(int contextGroupId);
   bool hasConsoleMessageStorage(int contextGroupId);
   void discardInspectedContext(int contextGroupId, int contextId);
   void disconnect(V8InspectorSessionImpl*);
-  V8InspectorSessionImpl* sessionForContextGroup(int contextGroupId);
-  V8InspectorSessionImpl* sessionById(int sessionId);
+  V8InspectorSessionImpl* sessionById(int contextGroupId, int sessionId);
   InspectedContext* getContext(int groupId, int contextId) const;
   V8Console* console();
   void forEachContext(int contextGroupId,
                       std::function<void(InspectedContext*)> callback);
+  void forEachSession(int contextGroupId,
+                      std::function<void(V8InspectorSessionImpl*)> callback);
 
  private:
   v8::Isolate* m_isolate;
   V8InspectorClient* m_client;
   std::unique_ptr<V8Debugger> m_debugger;
   v8::Global<v8::Context> m_regexContext;
   int m_capturingStackTracesCount;
   unsigned m_lastExceptionId;
   int m_lastContextId;
   int m_lastSessionId = 0;
 
   using MuteExceptionsMap = protocol::HashMap<int, int>;
   MuteExceptionsMap m_muteExceptionsMap;
 
   using ContextByIdMap =
       protocol::HashMap<int, std::unique_ptr<InspectedContext>>;
   using ContextsByGroupMap =
       protocol::HashMap<int, std::unique_ptr<ContextByIdMap>>;
   ContextsByGroupMap m_contexts;
 
-  using SessionMap = protocol::HashMap<int, V8InspectorSessionImpl*>;
-  SessionMap m_sessions;
-  protocol::HashMap<int, V8InspectorSessionImpl*> m_sessionById;
+  // contextGroupId -> sessionId -> session
+  protocol::HashMap<int, protocol::HashMap<int, V8InspectorSessionImpl*>>
+      m_sessions;
 
   using ConsoleStorageMap =
       protocol::HashMap<int, std::unique_ptr<V8ConsoleMessageStorage>>;
   ConsoleStorageMap m_consoleStorageMap;
 
   protocol::HashMap<int, int> m_contextIdToGroupIdMap;
 
   std::unique_ptr<V8Console> m_console;
 
   DISALLOW_COPY_AND_ASSIGN(V8InspectorImpl);
 };
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_V8INSPECTORIMPL_H_