views: Use NOTREACHED() where appropriate.

ui/gfx/native_theme_win.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 "ui/gfx/native_theme_win.h"
 
 #include <windows.h>
 #include <uxtheme.h>
 #include <vsstyle.h>
 #include <vssym32.h>
@@ skipping 348 matching lines @@
       break;
     case kTextField:
       PaintTextField(hdc, part, state, rect, extra.text_field);
       break;
 
     case kSliderTrack:
     case kSliderThumb:
     default:
       // While transitioning NativeThemeWin to the single Paint() entry point,
       // unsupported parts will DCHECK here.
-      DCHECK(false);
+      NOTREACHED();
   }
 }
 
 SkColor NativeThemeWin::GetSystemColor(ColorId color_id) const {
   switch (color_id) {
 
     // Dialogs
     case kColorId_DialogBackground:
       // TODO(benrg): Should this use the new Windows theme functions? The old
       // code in DialogClientView::OnPaint used GetSysColor(COLOR_3DFACE).
@@ skipping 1374 matching lines @@
     handle = open_theme_(NULL, L"Spin");
     break;
   default:
     NOTREACHED();
   }
   theme_handles_[theme_name] = handle;
   return handle;
 }
 
 }  // namespace gfx