Add some remoting targets to GN build.

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': {
     'remoting_base_sources': [
+      # Note: sources list duplicated in GN build.
+      # See remoting/base/BUILD.gn
       'base/auth_token_util.cc',
       'base/auth_token_util.h',
       'base/auto_thread.cc',
       'base/auto_thread.h',
       'base/auto_thread_task_runner.cc',
       'base/auto_thread_task_runner.h',
       'base/capabilities.cc',
       'base/capabilities.h',
       'base/compound_buffer.cc',
       'base/compound_buffer.h',
@@ skipping 42 matching lines @@
       'codec/video_decoder_vpx.cc',
       'codec/video_decoder_vpx.h',
       'codec/video_encoder.h',
       'codec/video_encoder_verbatim.cc',
       'codec/video_encoder_verbatim.h',
       'codec/video_encoder_vpx.cc',
       'codec/video_encoder_vpx.h',
     ],
 
     'remoting_protocol_sources': [
+      # Note: sources list duplicated in GN build.
+      # See remoting/protocol/BUILD.gn
       'protocol/audio_reader.cc',
       'protocol/audio_reader.h',
       'protocol/audio_stub.h',
       'protocol/audio_writer.cc',
       'protocol/audio_writer.h',
       'protocol/auth_util.cc',
       'protocol/auth_util.h',
       'protocol/authentication_method.cc',
       'protocol/authentication_method.h',
       'protocol/authenticator.cc',
@@ skipping 112 matching lines @@
       'signaling/log_to_server.cc',
       'signaling/log_to_server.h',
       'signaling/server_log_entry.cc',
       'signaling/server_log_entry.h',
       'signaling/signal_strategy.h',
       'signaling/xmpp_signal_strategy.cc',
       'signaling/xmpp_signal_strategy.h',
     ],
 
     'remoting_client_sources': [
+      # Note: sources list duplicated in GN build.
+      # See remoting/client/BUILD.gn
       'client/audio_decode_scheduler.cc',
       'client/audio_decode_scheduler.h',
       'client/audio_player.cc',
       'client/audio_player.h',
       'client/chromoting_client.cc',
       'client/chromoting_client.h',
       'client/chromoting_stats.cc',
       'client/chromoting_stats.h',
       'client/client_context.cc',
       'client/client_context.h',
       'client/client_status_logger.cc',
       'client/client_status_logger.h',
       'client/client_user_interface.h',
       'client/frame_consumer.h',
       'client/frame_consumer_proxy.cc',
       'client/frame_consumer_proxy.h',
       'client/frame_producer.h',
       'client/key_event_mapper.cc',
       'client/key_event_mapper.h',
       'client/server_log_entry_client.cc',
       'client/server_log_entry_client.h',
       'client/software_video_renderer.cc',
       'client/software_video_renderer.h',
       'client/token_fetcher_proxy.cc',
       'client/token_fetcher_proxy.h',
       'client/video_renderer.h',
     ],
 
     'remoting_client_plugin_sources': [
+      # Note: sources list duplicated in GN build.
+      # See remoting/client/plugin/BUILD.gn
       'client/plugin/chromoting_instance.cc',
       'client/plugin/chromoting_instance.h',
       'client/plugin/delegating_signal_strategy.cc',
       'client/plugin/delegating_signal_strategy.h',
       'client/plugin/media_source_video_renderer.cc',
       'client/plugin/media_source_video_renderer.h',
       'client/plugin/normalizing_input_filter_cros.cc',
       'client/plugin/normalizing_input_filter_cros.h',
       'client/plugin/normalizing_input_filter_mac.cc',
       'client/plugin/normalizing_input_filter_mac.h',
@@ skipping 11 matching lines @@
       'client/plugin/pepper_plugin_thread_delegate.h',
       'client/plugin/pepper_port_allocator.cc',
       'client/plugin/pepper_port_allocator.h',
       'client/plugin/pepper_util.cc',
       'client/plugin/pepper_util.h',
       'client/plugin/pepper_view.cc',
       'client/plugin/pepper_view.h',
     ],
   }
 }