Fix a regression in checking the status of the touch events.

ui/events/base_event_utils.h

 // Copyright 2015 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_BASE_EVENT_UTILS_H_
 #define UI_EVENTS_BASE_EVENT_UTILS_H_
 
 #include "base/basictypes.h"
 #include "ui/events/events_base_export.h"
 
 // Common functions to be used for all platforms.
 namespace ui {
 
 // Generate an unique identifier for events.
 EVENTS_BASE_EXPORT uint32 GetNextTouchEventId();
 
 // Checks if |flags| contains system key modifiers.
 EVENTS_BASE_EXPORT bool IsSystemKeyModifier(int flags);
 
 #if defined(OS_CHROMEOS)
-// Sets the status of touch events to |enabled| on ChromeOS only. Non-ChromeOS
-// platforms depend on the state of the |kTouchEvents| flags.
+// Sets the status of touch events to |enabled| on ChromeOS only.
 EVENTS_BASE_EXPORT void SetTouchEventsEnabled(bool enabled);
 #endif  // defined(OS_CHROMEOS)
 
 // Returns true if the touch events are enabled. On non-ChromeOS platforms, this
-// depends on the state of the |kTouchEvents| flags.
+// depends only on the state of the |kTouchEvents| flag. On ChromeOS, it also
+// depends on the value set using the above function.
 EVENTS_BASE_EXPORT bool AreTouchEventsEnabled();
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_BASE_EVENT_UTILS_H_