DevTools: show filesystem file by default

third_party/WebKit/Source/devtools/front_end/sources/UISourceCodeFrame.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:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 240 matching lines @@
       this._removeMessageFromSource(message);
     Common.EventTarget.removeEventListeners(this._messageAndDecorationListeners);
 
     this._persistenceBinding = binding;
 
     for (var message of this._allMessages())
       this._addMessageToSource(message);
     this._installMessageAndDecorationListeners();
     this._updateStyle();
     this._decorateAllTypes();
+    this.onBindingChanged();
+  }
+
+  /**
+   * @protected
+   */
+  onBindingChanged() {
+    // Overriden in subclasses.
   }
 
   _updateStyle() {
     this.element.classList.toggle(
         'source-frame-unsaved-committed-changes',
         Persistence.persistence.hasUnsavedCommittedChanges(this._uiSourceCode));
     this.setEditable(!this._canEditSource());
   }
 
   onUISourceCodeContentChanged() {
@@ skipping 415 matching lines @@
 
 /**
  * @param {!Workspace.UISourceCode.Message} a
  * @param {!Workspace.UISourceCode.Message} b
  * @return {number}
  */
 Workspace.UISourceCode.Message.messageLevelComparator = function(a, b) {
   return Workspace.UISourceCode.Message._messageLevelPriority[a.level()] -
       Workspace.UISourceCode.Message._messageLevelPriority[b.level()];
 };