[ChromeDriver] Add support for attaching multiple DevToolsEventListeners to a DevToolsClient.

chrome/test/chromedriver/devtools_client_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 CHROME_TEST_CHROMEDRIVER_DEVTOOLS_CLIENT_IMPL_H_
 #define CHROME_TEST_CHROMEDRIVER_DEVTOOLS_CLIENT_IMPL_H_
 
+#include <list>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/test/chromedriver/devtools_client.h"
 #include "chrome/test/chromedriver/net/sync_websocket_factory.h"
 #include "googleurl/src/gurl.h"
 
@@ skipping 26 matching lines @@
 }  // namespace internal
 
 class DevToolsEventListener;
 class Status;
 class SyncWebSocket;
 
 class DevToolsClientImpl : public DevToolsClient {
  public:
   // Listener may be NULL.
   DevToolsClientImpl(const SyncWebSocketFactory& factory,
-                     const std::string& url,
-                     DevToolsEventListener* listener);
+                     const std::string& url);
 
   typedef base::Callback<bool(
       const std::string&,
       int,
       internal::InspectorMessageType*,
       internal::InspectorEvent*,
       internal::InspectorCommandResponse*)> ParserFunc;
   DevToolsClientImpl(const SyncWebSocketFactory& factory,
                      const std::string& url,
-                     DevToolsEventListener* listener,
                      const ParserFunc& parser_func);
 
   virtual ~DevToolsClientImpl();
 
   // Overridden from DevToolsClient:
   virtual Status SendCommand(const std::string& method,
                              const base::DictionaryValue& params) OVERRIDE;
   virtual Status SendCommandAndGetResult(
       const std::string& method,
       const base::DictionaryValue& params,
       scoped_ptr<base::DictionaryValue>* result) OVERRIDE;
+  virtual void AddListener(DevToolsEventListener* listener) OVERRIDE;
 
  private:
   Status SendCommandInternal(
       const std::string& method,
       const base::DictionaryValue& params,
       scoped_ptr<base::DictionaryValue>* result);
+  virtual void NotifyEventListeners(const std::string& method,
+                                    const base::DictionaryValue& params);
   scoped_ptr<SyncWebSocket> socket_;
   GURL url_;
-  DevToolsEventListener* listener_;
   ParserFunc parser_func_;
+  std::list<DevToolsEventListener*> listeners_;
   bool connected_;
   int next_id_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsClientImpl);
 };
 
 namespace internal {
 
 bool ParseInspectorMessage(
     const std::string& message,
     int expected_id,
     InspectorMessageType* type,
     InspectorEvent* event,
     InspectorCommandResponse* command_response);
 
 }  // namespace internal
 
 #endif  // CHROME_TEST_CHROMEDRIVER_DEVTOOLS_CLIENT_IMPL_H_