Remove ~1750 superfluous includes from core

Source/core/html/DateInputType.cpp

 /*
  * Copyright (C) 2010 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 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/html/DateInputType.h"
 
 #include "HTMLNames.h"
-#include "core/dom/KeyboardEvent.h"
 #include "core/html/DateTimeFieldsState.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/InputTypeNames.h"
-#include "core/html/shadow/PickerIndicatorElement.h"
 #include "core/platform/DateComponents.h"
 #include "core/platform/LocalizedStrings.h"
 #include "core/platform/text/PlatformLocale.h"
 #include <wtf/PassOwnPtr.h>
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 static const int dateDefaultStep = 1;
@@ skipping 76 matching lines @@
     layoutParameters.placeholderForYear = placeholderForYearField();
 }
 
 bool DateInputType::isValidFormat(bool hasYear, bool hasMonth, bool hasWeek, bool hasDay, bool hasAMPM, bool hasHour, bool hasMinute, bool hasSecond) const
 {
     return hasYear && hasMonth && hasDay;
 }
 #endif
 
 } // namespace WebCore