ui: Remove some unnecessary functions from the API.

ui/events/event_utils.h

 // 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.
 
 #ifndef UI_EVENTS_EVENT_UTILS_H_
 #define UI_EVENTS_EVENT_UTILS_H_
 
 #include "base/event_types.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/event_constants.h"
@@ skipping 130 matching lines @@
 EVENTS_EXPORT bool GetGestureTimes(const base::NativeEvent& native_event,
                                double* start_time,
                                double* end_time);
 
 // Returns whether natural scrolling should be used for touchpad.
 EVENTS_EXPORT bool ShouldDefaultToNaturalScroll();
 
 // Returns whether or not the internal display produces touch events.
 EVENTS_EXPORT gfx::Display::TouchSupport GetInternalDisplayTouchSupport();
 
-// Was this event generated by a touchpad device?
-// The caller is responsible for ensuring that this is a mouse/touchpad event
-// before calling this function.
-EVENTS_EXPORT bool IsTouchpadEvent(const base::NativeEvent& event);
-
 #if defined(OS_WIN)
 EVENTS_EXPORT int GetModifiersFromACCEL(const ACCEL& accel);
 EVENTS_EXPORT int GetModifiersFromKeyState();
 
 // Returns true if |message| identifies a mouse event that was generated as the
 // result of a touch event.
 EVENTS_EXPORT bool IsMouseEventFromTouch(UINT message);
 
 // Converts scan code and lParam each other.  The scan code
 // representing an extended key contains 0xE000 bits.
 EVENTS_EXPORT uint16 GetScanCodeFromLParam(LPARAM lParam);
 EVENTS_EXPORT LPARAM GetLParamFromScanCode(uint16 scan_code);
 
 #endif
 
 // Registers a custom event type.
 EVENTS_EXPORT int RegisterCustomEventType();
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_UTILS_H_