DevTools: Implement console message logging through an extension

Source/devtools/front_end/timeline/TimelineModel.js

Index: Source/devtools/front_end/timeline/TimelineModel.js
diff --git a/Source/devtools/front_end/timeline/TimelineModel.js b/Source/devtools/front_end/timeline/TimelineModel.js
index c5bef5d905f3cdcea7fd433741b4a0a239681e96..ee5c80bb4d07c9736b845afdf6253f8823493a39 100644
--- a/Source/devtools/front_end/timeline/TimelineModel.js
+++ b/Source/devtools/front_end/timeline/TimelineModel.js
@@ -1055,7 +1055,7 @@ WebInspector.TimelineModelLoader.prototype = {
         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();
@@ -1130,15 +1130,15 @@ WebInspector.TimelineModelLoadFromFileDelegate.prototype = {
         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);
         }
     }
 }