DevTools: Implement console message logging through an extension

Source/devtools/front_end/timeline/TimelineModel.js

 /*
  * Copyright (C) 2012 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 1037 matching lines @@
             return;
 
         // Prepending "0" to turn string into valid JSON.
         if (!this._firstChunk)
             json = "[0" + json;
 
         var items;
         try {
             items = /** @type {!Array.<!TimelineAgent.TimelineEvent>} */ (JSON.parse(json));
         } catch (e) {
-            WebInspector.console.showErrorMessage("Malformed timeline data.");
+            WebInspector.messageSink.addErrorMessage("Malformed timeline data.", true);
             this._model.reset();
             this._reader.cancel();
             this._progress.done();
             return;
         }
 
         if (this._firstChunk) {
             this._version = items[0];
             this._firstChunk = false;
             this._model.reset();
@@ skipping 54 matching lines @@
 
     /**
      * @param {!WebInspector.ChunkedReader} reader
      */
     onError: function(reader, event)
     {
         this._progress.done();
         this._model.reset();
         switch (event.target.error.code) {
         case FileError.NOT_FOUND_ERR:
-            WebInspector.console.showErrorMessage(WebInspector.UIString("File \"%s\" not found.", reader.fileName()));
+            WebInspector.messageSink.addErrorMessage(WebInspector.UIString("File \"%s\" not found.", reader.fileName()), true);
             break;
         case FileError.NOT_READABLE_ERR:
-            WebInspector.console.showErrorMessage(WebInspector.UIString("File \"%s\" is not readable", reader.fileName()));
+            WebInspector.messageSink.addErrorMessage(WebInspector.UIString("File \"%s\" is not readable", reader.fileName()), true);
             break;
         case FileError.ABORT_ERR:
             break;
         default:
-            WebInspector.console.showErrorMessage(WebInspector.UIString("An error occurred while reading the file \"%s\"", reader.fileName()));
+            WebInspector.messageSink.addErrorMessage(WebInspector.UIString("An error occurred while reading the file \"%s\"", reader.fileName()), true);
         }
     }
 }
 
 /**
  * @constructor
  */
 WebInspector.TimelineSaver = function(stream)
 {
     this._stream = stream;
@@ skipping 75 matching lines @@
         function recordTimestampComparator(a, b)
         {
             // Never return 0, as the merge function will squash identical entries.
             return a.startTime() < b.startTime() ? -1 : 1;
         }
         var result = this._backgroundRecordsBuffer.mergeOrdered(records, recordTimestampComparator);
         this._backgroundRecordsBuffer = [];
         return result;
     }
 }