ui: Remove some unnecessary functions from the API.

ui/events/win/events_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 <windowsx.h>
 
 #include "ui/events/event_constants.h"
 
 #include "base/logging.h"
 #include "base/time/time.h"
@@ skipping 334 matching lines @@
 
 bool GetGestureTimes(const base::NativeEvent& native_event,
                      double* start_time,
                      double* end_time) {
   // Not supported in Windows.
   *start_time = 0;
   *end_time = 0;
   return false;
 }
 
-void SetNaturalScroll(bool enabled) {
-  NOTIMPLEMENTED();
-}
-
-bool IsNaturalScrollEnabled() {
-  NOTIMPLEMENTED();
-  return false;
-}
-
-bool IsTouchpadEvent(const base::NativeEvent& event) {
-  NOTIMPLEMENTED();
-  return false;
-}
-
 int GetModifiersFromACCEL(const ACCEL& accel) {
   int modifiers = EF_NONE;
   if (accel.fVirt & FSHIFT)
     modifiers |= EF_SHIFT_DOWN;
   if (accel.fVirt & FCONTROL)
     modifiers |= EF_CONTROL_DOWN;
   if (accel.fVirt & FALT)
     modifiers |= EF_ALT_DOWN;
   return modifiers;
 }
@@ skipping 36 matching lines @@
 }
 
 LPARAM GetLParamFromScanCode(uint16 scan_code) {
   LPARAM l_param = static_cast<LPARAM>(scan_code & 0x00FF) << 16;
   if ((scan_code & 0xE000) == 0xE000)
     l_param |= (1 << 24);
   return l_param;
 }
 
 }  // namespace ui