Allow multiple logging::LogMessage{Handler,Listener}s

remoting/client/plugin/chromoting_instance.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 REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_
 #define REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 118 matching lines @@
 
   // protocol::CursorShapeStub interface.
   void SetCursorShape(const protocol::CursorShapeInfo& cursor_shape) override;
 
   // PepperVideoRenderer::EventHandler interface.
   void OnVideoDecodeError() override;
   void OnVideoFirstFrameReceived() override;
   void OnVideoFrameDirtyRegion(
       const webrtc::DesktopRegion& dirty_region) override;
 
-  // Registers a global log message handler that redirects the log output to
+  // Registers a global log message listener that redirects the log output to
   // our plugin instance.
   // This is called by the plugin's PPP_InitializeModule.
   // Note that no logging will be processed unless a ChromotingInstance has been
   // registered for logging (see RegisterLoggingInstance).
-  static void RegisterLogMessageHandler();
+  static void RegisterLogMessageListener();
 
   // Registers this instance so it processes messages sent by the global log
   // message handler. This overwrites any previously registered instance.
   void RegisterLoggingInstance();
 
   // Unregisters this instance so that debug log messages will no longer be sent
   // to it. If this instance is not the currently registered logging instance,
   // then the currently registered instance will stay in effect.
   void UnregisterLoggingInstance();
 
-  // A Log Message Handler that is called after each LOG message has been
-  // processed. This must be of type LogMessageHandlerFunction defined in
+  // A Log Message Listener that is called after each LOG message has been
+  // processed. This must be of type LogMessageListenerFunction defined in
   // base/logging.h.
-  static bool LogToUI(int severity, const char* file, int line,
+  static void LogToUI(int severity, const char* file, int line,
                       size_t message_start, const std::string& str);
 
   // Requests the webapp to fetch a third-party token.
   void FetchThirdPartyToken(
       const std::string& host_public_key,
       const std::string& token_url,
       const std::string& scope,
       const protocol::ThirdPartyTokenFetchedCallback& token_fetched_callback);
 
   // Updates the specified UMA enumeration histogram with the input value.
@@ skipping 123 matching lines @@
 
   // Weak reference to this instance, used for global logging and task posting.
   base::WeakPtrFactory<ChromotingInstance> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromotingInstance);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_