Revert of DevTools: allow storing devtools preferences on the browser side. [blink]

Source/devtools/front_end/ui/SplitView.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 779 matching lines @@
 
     _restoreSidebarSizeFromSettings: function()
     {
         var settingForOrientation = this._settingForOrientation();
         this._savedSidebarSizeDIP = settingForOrientation ? settingForOrientation.size : 0;
     },
 
     _restoreAndApplyShowModeFromSettings: function()
     {
         var orientationState = this._settingForOrientation();
-        this._savedShowMode = orientationState && orientationState.showMode ? orientationState.showMode : this._showMode;
+        this._savedShowMode = orientationState && orientationState.showMode ? orientationState.showMode : WebInspector.SplitView.ShowMode.Both;
         this._showMode = this._savedShowMode;
 
         switch (this._savedShowMode) {
         case WebInspector.SplitView.ShowMode.Both:
             this.showBoth();
             break;
         case WebInspector.SplitView.ShowMode.OnlyMain:
             this.hideSidebar();
             break;
         case WebInspector.SplitView.ShowMode.OnlySidebar:
@@ skipping 79 matching lines @@
         this._showHideSidebarButton.classList.toggle("toggled-hide", !sidebarHidden);
         this._showHideSidebarButton.classList.toggle("top-sidebar-show-hide-button", !this.isVertical() && !this.isSidebarSecond());
         this._showHideSidebarButton.classList.toggle("right-sidebar-show-hide-button", this.isVertical() && this.isSidebarSecond());
         this._showHideSidebarButton.classList.toggle("bottom-sidebar-show-hide-button", !this.isVertical() && this.isSidebarSecond());
         this._showHideSidebarButton.classList.toggle("left-sidebar-show-hide-button", this.isVertical() && !this.isSidebarSecond());
         this._showHideSidebarButton.title = sidebarHidden ? WebInspector.UIString("Show %s", this._showHideSidebarButtonTitle) : WebInspector.UIString("Hide %s", this._showHideSidebarButtonTitle);
     },
 
     __proto__: WebInspector.View.prototype
 }