Add remoting and PPAPI tests to GN build

remoting/remoting_host.gypi

 # Copyright (c) 2012 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.
 
 {
   'includes': [
     'remoting_enable.gypi',
   ],
 
   'conditions': [
@@ skipping 193 matching lines @@
                 '../third_party/libjingle/libjingle.gyp:libpeerconnection',
               ],
               'sources': [
                 '<@(remoting_cast_sources)',
               ],
             }],
           ],
         },  # end of target 'remoting_host'
 
         {
+          # GN version: //remoting/host/native_messaging
           'target_name': 'remoting_native_messaging_base',
           'type': 'static_library',
           'variables': { 'enable_wexit_time_destructors': 1, },
           'dependencies': [
             '../base/base.gyp:base',
           ],
           'sources': [
+            # Note: sources list duplicated in GN build.
             'host/native_messaging/native_messaging_pipe.cc',
             'host/native_messaging/native_messaging_pipe.h',
             'host/native_messaging/native_messaging_reader.cc',
             'host/native_messaging/native_messaging_reader.h',
             'host/native_messaging/native_messaging_writer.cc',
             'host/native_messaging/native_messaging_writer.h',
             'host/native_messaging/pipe_messaging_channel.cc',
             'host/native_messaging/pipe_messaging_channel.h',
           ],
         },  # end of target 'remoting_native_messaging_base'
 
         {
+          # GN version: //remoting/host/setup
           'target_name': 'remoting_host_setup_base',
           'type': 'static_library',
           'variables': { 'enable_wexit_time_destructors': 1, },
           'dependencies': [
             '../base/base.gyp:base',
             '../google_apis/google_apis.gyp:google_apis',
             'remoting_host',
           ],
           'defines': [
             'VERSION=<(version_full)',
@@ skipping 492 matching lines @@
               # Dummy target for chromeos==1
               'target_name': 'remoting_it2me_native_messaging_host',
               'type': 'executable',
             },
           ],  # targets
         }],  # end of chromeos==0
       ],  # end of conditions
     }],  # end of OS!="win" and enable_remoting_host==1
   ],  # end of 'conditions'
 }