Split //ui/events/devices into two targets.

ui/views/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("views.gyp") ],
@@ skipping 87 matching lines @@
   if (use_ozone) {
     deps += [ "//ui/ozone" ]
   }
   if (use_x11) {
     configs += [
       "//build/config/linux:x11",
       "//build/config/linux:xrandr",
     ]
     deps += [
       "//ui/events/devices",
+      "//ui/events/devices/x11",
       "//ui/events/platform/x11",
       "//ui/gfx/x",
     ]
   }
 
   if (use_aura) {
     sources += gypi_values.views_aura_sources
     deps += [
       "//ui/aura",
       "//ui/touch_selection",
@@ skipping 202 matching lines @@
       "//ui/base:test_support",
       "//ui/compositor",
       "//ui/events:test_support",
       "//ui/gl:test_support",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
     ]
   }
 }