[DevTools] Remove Console.messagesCleared event.

third_party/WebKit/Source/devtools/front_end/sdk/ResourceTreeModel.js

 /*
  * Copyright (C) 2011 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 271 matching lines @@
         this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.FrameWillNavigate, frame);
 
         this._removeSecurityOrigin(frame.securityOrigin);
         frame._navigate(framePayload);
         var addedOrigin = frame.securityOrigin;
 
         if (frame.isMainFrame())
             this._inspectedPageURL = frame.url;
 
         this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.FrameNavigated, frame);
-        if (frame.isMainFrame())
+        if (frame.isMainFrame()) {
             this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.MainFrameNavigated, frame);
+            if (WebInspector.moduleSetting("preserveConsoleLog").get())
+                WebInspector.console.log(WebInspector.UIString("Navigated to %s", frame.url));
+            else
+                this.target().consoleModel.clear();
+        }
         if (addedOrigin)
             this._addSecurityOrigin(addedOrigin);
 
         // Fill frame with retained resources (the ones loaded using new loader).
         var resources = frame.resources();
         for (var i = 0; i < resources.length; ++i)
             this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.ResourceAdded, resources[i]);
 
         if (frame.isMainFrame())
             this._dispatchInspectedURLChanged();
@@ skipping 667 matching lines @@
     },
 
     /**
      * @override
      */
     interstitialHidden: function()
     {
         // Frontend is not interested in interstitials.
     }
 }