Add new InputDeviceManager interface.

ui/events/x/events_x_utils.cc

 // Copyright (c) 2016 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/events/x/events_x_utils.h"
 
 #include <stddef.h>
 #include <string.h>
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
@@ skipping 359 matching lines @@
 
 }  // namespace
 
 namespace ui {
 
 EventType EventTypeFromXEvent(const XEvent& xev) {
   // Allow the DeviceDataManager to block the event. If blocked return
   // ET_UNKNOWN as the type so this event will not be further processed.
   // NOTE: During some events unittests there is no device data manager.
   if (DeviceDataManager::HasInstance() &&
-      static_cast<DeviceDataManagerX11*>(DeviceDataManager::GetInstance())
-          ->IsEventBlocked(xev)) {
+      DeviceDataManagerX11::GetInstance()->IsEventBlocked(xev)) {
     return ET_UNKNOWN;
   }
 
   switch (xev.type) {
     case KeyPress:
       return ET_KEY_PRESSED;
     case KeyRelease:
       return ET_KEY_RELEASED;
     case ButtonPress:
       if (static_cast<int>(xev.xbutton.button) >= kMinWheelButton &&
@@ skipping 436 matching lines @@
 
 void ResetTimestampRolloverCountersForTesting(
     std::unique_ptr<base::TickClock> tick_clock) {
   g_last_seen_timestamp_ms = 0;
   g_rollover_ms = 0;
   g_bogus_x11_timestamps = false;
   g_tick_clock.Get() = std::move(tick_clock);
 }
 
 }  // namespace ui