Added UMA statistics for changing the active window via click or touch events.

components/view_manager/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")
 import("//third_party/mojo/src/mojo/public/mojo_application.gni")
 
 mojo_native_application("view_manager") {
   sources = [
@@ skipping 43 matching lines @@
     "server_view_drawn_tracker_observer.h",
     "server_view_observer.h",
     "view_coordinate_conversions.cc",
     "view_coordinate_conversions.h",
     "view_locator.cc",
     "view_locator.h",
     "view_manager_app.cc",
     "view_manager_app.h",
     "view_manager_service_impl.cc",
     "view_manager_service_impl.h",
+    "window_activation_pre_target_handler.cc",
+    "window_activation_pre_target_handler.h",
+    "window_activation_pre_target_handler_observer.cc",
+    "window_activation_pre_target_handler_observer.h",
     "window_manager_access_policy.cc",
     "window_manager_access_policy.h",
   ]
 
   public_deps = [
     "//components/view_manager/public/cpp",
   ]
 
   deps = [
     "//base",
@@ skipping 100 matching lines @@
     "//base/test:test_config",
     "//components/view_manager/public/cpp",
     "//components/view_manager/public/interfaces",
     "//mojo/application/public/cpp:test_support",
     "//ui/mojo/geometry:interfaces",
     "//ui/mojo/geometry:util",
   ]
 
   data_deps = [ ":view_manager" ]
 }