aura: Introduce EventInjector.

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 44 matching lines @@
     "client/visibility_client.h",
     "client/window_parenting_client.cc",
     "client/window_parenting_client.h",
     "client/window_stacking_client.cc",
     "client/window_stacking_client.h",
     "env.cc",
     "env.h",
     "env_input_state_controller.cc",
     "env_input_state_controller.h",
     "env_observer.h",
+    "event_injector.cc",

[sky, 2017/05/12 12:11:51]

Should EventInjector be test only? At least for mus you would need to make sure
you added the right capability, and we wouldn't want most clients using this
api.

[sadrul, 2017/05/12 21:26:08]

It unfortunately can't be, right now, because telemetry tests run with normal
chrome binary. So yes, we need to add 'test' to the manifest too :-/ Not sure if
there's some way to add such capabilities at runtime instead of in the manifest.

+    "event_injector.h",
     "input_state_lookup.cc",
     "input_state_lookup.h",
     "input_state_lookup_win.cc",
     "input_state_lookup_win.h",
     "layout_manager.cc",
     "layout_manager.h",
     "local/compositor_frame_sink_local.cc",
     "local/compositor_frame_sink_local.h",
     "local/window_port_local.cc",
     "local/window_port_local.h",
@@ skipping 308 matching lines @@
   ]
 
   if (is_linux) {
     deps += [ "//third_party/mesa" ]
   }
 
   data_deps = [
     "//third_party/mesa:osmesa",
   ]
 }