Avoid two targeting phases in aura client-lib and EventProcessor.

ui/aura/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")
 import("//testing/test.gni")
 
 component("aura") {
   sources = [
     "../wm/public/activation_change_observer.cc",
@@ skipping 234 matching lines @@
     "test/test_cursor_client.cc",
     "test/test_cursor_client.h",
     "test/test_focus_client.cc",
     "test/test_focus_client.h",
     "test/test_screen.cc",
     "test/test_screen.h",
     "test/test_window_delegate.cc",
     "test/test_window_delegate.h",
     "test/test_window_parenting_client.cc",
     "test/test_window_parenting_client.h",
+    "test/test_window_targeter.cc",
+    "test/test_window_targeter.h",
     "test/test_windows.cc",
     "test/test_windows.h",
     "test/ui_controls_factory_aura.h",
     "test/window_event_dispatcher_test_api.cc",
     "test/window_event_dispatcher_test_api.h",
     "test/window_test_api.cc",
     "test/window_test_api.h",
   ]
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
@@ skipping 106 matching lines @@
   ]
 
   if (is_linux) {
     deps += [ "//third_party/mesa" ]
   }
 
   data_deps = [
     "//third_party/mesa:osmesa",
   ]
 }