Adding a new authenticator which can be used to validate the remote user

remoting/remoting_srcs.gypi

 # 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.
 
 {
   'variables': {
     'daemon_controller_guid': '655bd819-c08c-4b04-80c2-f160739ff6ef',
     'rdp_desktop_session_guid': '6a7699f0-ee43-43e7-aa30-a6738f9bd470',
     'remoting_base_sources': [
       'base/auto_thread.cc',
@@ skipping 209 matching lines @@
       'protocol/third_party_client_authenticator.h',
       'protocol/third_party_host_authenticator.cc',
       'protocol/third_party_host_authenticator.h',
       'protocol/token_validator.h',
       'protocol/transport.cc',
       'protocol/transport.h',
       'protocol/transport_context.cc',
       'protocol/transport_context.h',
       'protocol/v2_authenticator.cc',
       'protocol/v2_authenticator.h',
+      'protocol/validating_authenticator.cc',
+      'protocol/validating_authenticator.h',
       'protocol/video_renderer.h',
       'protocol/video_stats_stub.h',
       'protocol/video_stub.h',
     ],
 
     # Files in protocol that don't compile for NaCl.
     'remoting_protocol_nonnacl_sources': [
       'protocol/capture_scheduler.cc',
       'protocol/capture_scheduler.h',
       'protocol/chromium_port_allocator_factory.cc',
@@ skipping 113 matching lines @@
       'client/plugin/pepper_url_request.cc',
       'client/plugin/pepper_url_request.h',
       'client/plugin/pepper_util.cc',
       'client/plugin/pepper_util.h',
       'client/plugin/pepper_video_renderer.h',
       'client/plugin/pepper_video_renderer_2d.cc',
       'client/plugin/pepper_video_renderer_2d.h',
       'client/plugin/pepper_video_renderer_3d.cc',
       'client/plugin/pepper_video_renderer_3d.h',
     ],
-    
+
     'remoting_opengl_renderer_sources': [
       'client/gl_canvas.cc',
       'client/gl_canvas.h',
       'client/gl_cursor.cc',
       'client/gl_cursor.h',
       'client/gl_cursor_feedback.cc',
       'client/gl_cursor_feedback.h',
       'client/gl_cursor_feedback_texture.cc',
       'client/gl_cursor_feedback_texture.h',
       'client/gl_desktop.cc',
       'client/gl_desktop.h',
       'client/gl_helpers.cc',
       'client/gl_helpers.h',
       'client/gl_math.cc',
       'client/gl_math.h',
       'client/gl_renderer.cc',
       'client/gl_renderer.h',
       'client/gl_render_layer.cc',
       'client/gl_render_layer.h',
     ],
   }
 }