[DevTools] Dock to left mode.

Source/devtools/front_end/SourcesPanel.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1652 matching lines @@
         var uiSourceCodes = this._editorContainer.historyUISourceCodes();
         /** @type {!Map.<!WebInspector.UISourceCode, number>} */
         var defaultScores = new Map();
         for (var i = 1; i < uiSourceCodes.length; ++i) // Skip current element
             defaultScores.put(uiSourceCodes[i], uiSourceCodes.length - i);
         WebInspector.OpenResourceDialog.show(this, this.editorView.mainElement(), undefined, defaultScores);
     },
 
     _dockSideChanged: function()
     {
-        var dockSide = WebInspector.dockController.dockSide();
-        var vertically = dockSide === WebInspector.DockController.State.DockedToRight && WebInspector.settings.splitVerticallyWhenDockedToRight.get();
+        var vertically = WebInspector.dockController.isVertical() && WebInspector.settings.splitVerticallyWhenDockedToRight.get();
         this._splitVertically(vertically);
     },
 
     /**
      * @param {boolean} vertically
      */
     _splitVertically: function(vertically)
     {
         if (this.sidebarPaneView && vertically === !this.splitView.isVertical())
             return;
@@ skipping 216 matching lines @@
 WebInspector.SourcesPanel.UILocationRevealer.prototype = {
     /**
      * @param {!Object} uiLocation
      */
     reveal: function(uiLocation)
     {
         if (uiLocation instanceof WebInspector.UILocation)
             /** @type {!WebInspector.SourcesPanel} */ (WebInspector.showPanel("sources")).showUILocation(uiLocation);
     }
 }