events: Move some files into ui/base/events/

ui/base/cocoa/events_mac.mm

 // 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 <Cocoa/Cocoa.h>
 
-#include "ui/base/events.h"
+#include "ui/base/events/event_constants.h"
 
 #include "base/logging.h"
 #include "base/time.h"
 #import "ui/base/keycodes/keyboard_code_conversion_mac.h"
 #include "ui/gfx/point.h"
 
 namespace ui {
 
 EventType EventTypeFromNative(const base::NativeEvent& native_event) {
   NSEventType native_type = [native_event type];
@@ skipping 178 matching lines @@
                        modifierFlags:0
                            timestamp:[NSDate timeIntervalSinceReferenceDate]
                         windowNumber:0
                              context:nil
                              subtype:0
                                data1:0
                                data2:0];
 }
 
 }  // namespace ui