Clean up IconNTP-related code

ui/base/ui_base_switches.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 #include "ui/base/ui_base_switches.h"
 
 namespace switches {
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
@@ skipping 16 matching lines @@
 // Disables merging the key event (WM_KEY*) with the char event (WM_CHAR).
 const char kDisableMergeKeyCharEvents[]     = "disable-merge-key-char-events";
 
 // Enables merging the key event (WM_KEY*) with the char event (WM_CHAR).
 const char kEnableMergeKeyCharEvents[]     = "enable-merge-key-char-events";
 #endif
 
 // Disables use of DWM composition for top level windows.
 const char kDisableDwmComposition[] = "disable-dwm-composition";
 
-// Disables large icons on the New Tab page.
-const char kDisableIconNtp[] = "disable-icon-ntp";
-
 // Disables touch adjustment.
 const char kDisableTouchAdjustment[] = "disable-touch-adjustment";
 
 // Disables touch event based drag and drop.
 const char kDisableTouchDragDrop[] = "disable-touch-drag-drop";
 
-// Enables large icons on the New Tab page.
-const char kEnableIconNtp[] = "enable-icon-ntp";
-
 // Enables touch event based drag and drop.
 const char kEnableTouchDragDrop[] = "enable-touch-drag-drop";
 
 // The language file that we want to try to open. Of the form
 // language[-country] where language is the 2 letter code from ISO-639.
 const char kLang[] = "lang";
 
 // Defines the speed of Material Design visual feedback animations.
 const char kMaterialDesignInkDropAnimationSpeed[] =
     "material-design-ink-drop-animation-speed";
@@ skipping 20 matching lines @@
 // Use new window behavior for virtual keyboard (do not change work area in
 // non-sticky mode).
 const char kUseNewVirtualKeyboardBehavior[] =
     "use-new-virtual-keyboard-behavior";
 
 // Applies the material design mode passed via --top-chrome-md to elements
 // throughout Chrome (not just top Chrome).
 const char kExtendMdToSecondaryUi[] = "secondary-ui-md";
 
 }  // namespace switches