Fix slop region boundary handling.

ui/events/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 
 static_library("dom4_keycode_converter") {
   sources = [
     "keycodes/dom4/keycode_converter.cc",
     "keycodes/dom4/keycode_converter.h",
@@ skipping 91 matching lines @@
     "events_stub.cc",
     "gestures/gesture_point.cc",
     "gestures/gesture_point.h",
     "gestures/gesture_recognizer.h",
     "gestures/gesture_recognizer_impl.cc",
     "gestures/gesture_recognizer_impl.h",
     "gestures/gesture_recognizer_impl_mac.cc",
     "gestures/gesture_sequence.cc",
     "gestures/gesture_sequence.h",
     "gestures/gesture_types.h",
+    "gestures/unified_gesture_detector_enabled.cc",
+    "gestures/unified_gesture_detector_enabled.h",
     "gestures/velocity_calculator.cc",
     "gestures/velocity_calculator.h",
     "platform/x11/x11_event_source.cc",
     "platform/x11/x11_event_source.h",
     "win/events_win.cc",
     "x/events_x.cc",
   ]
 
   if (use_x11) {
     configs += [
@@ skipping 180 matching lines @@
     ":events_base",
     ":events_test_support",
     ":gesture_detection",
     "//base",
     "//base/test:run_all_unittests",
     "//skia",
     "//testing/gtest",
     "//ui/gfx:gfx_test_support",
   ]
 }