Remove compile-time / run-time flags for input[type=date].

Source/WebKit/chromium/public/WebRuntimeFeatures.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 113 matching lines @@
 
     WEBKIT_EXPORT static void enableShadowDOM(bool);
     WEBKIT_EXPORT static bool isShadowDOMEnabled();
 
     WEBKIT_EXPORT static void enableCustomDOMElements(bool);
     WEBKIT_EXPORT static bool isCustomDOMElementsEnabled();
 
     WEBKIT_EXPORT static void enableStyleScoped(bool);
     WEBKIT_EXPORT static bool isStyleScopedEnabled();
 
-    WEBKIT_EXPORT static void enableInputTypeDate(bool);
-    WEBKIT_EXPORT static bool isInputTypeDateEnabled();
-
     WEBKIT_EXPORT static void enableInputTypeDateTime(bool);
     WEBKIT_EXPORT static bool isInputTypeDateTimeEnabled();
 
     WEBKIT_EXPORT static void enableInputTypeDateTimeLocal(bool);
     WEBKIT_EXPORT static bool isInputTypeDateTimeLocalEnabled();
 
     WEBKIT_EXPORT static void enableInputTypeMonth(bool);
     WEBKIT_EXPORT static bool isInputTypeMonthEnabled();
 
     WEBKIT_EXPORT static void enableInputTypeTime(bool);
@@ skipping 34 matching lines @@
     WEBKIT_EXPORT static void enableNativeValidationMessage(bool);
     WEBKIT_EXPORT static bool isNativeValidationMessageEnabled();
 
 private:
     WebRuntimeFeatures();
 };
 
 } // namespace WebKit
 
 #endif