Moves ui/base/events to ui/events

BUG=none
TEST=none
R=ben@chromium.org
TBR=brettw@chromium.org, scherkus@chromium.org, ananta@chromium.org,

Review URL: https://codereview.chromium.org/23851041

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@223906 0039d316-1c4b-4281-b951-d872f2087c98

diff --git a/ash/system/logout_button/logout_button_tray.cc b/ash/system/logout_button/logout_button_tray.cc
index f62921f..c060730 100644
--- a/ash/system/logout_button/logout_button_tray.cc
+++ b/ash/system/logout_button/logout_button_tray.cc

@@ -14,7 +14,7 @@
 #include "base/logging.h"
 #include "grit/ash_resources.h"
 #include "third_party/skia/include/core/SkColor.h"
-#include "ui/base/events/event.h"
+#include "ui/events/event.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/size.h"