Add remoting and PPAPI tests to GN build

remoting/remoting_test.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.
 
 {
   'targets': [
     {
+      # GN version: //remoting:test_support
       'target_name': 'remoting_test_common',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../components/components.gyp:policy_component_test_support',
         '../net/net.gyp:net_test_support',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         'remoting_base',
         'remoting_client',
         'remoting_host',
         'remoting_protocol',
         'remoting_resources',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'host/fake_desktop_capturer.cc',
         'host/fake_desktop_capturer.h',
         'host/fake_desktop_environment.cc',
         'host/fake_desktop_environment.h',
         'host/fake_host_status_monitor.h',
         'host/fake_mouse_cursor_monitor.cc',
         'host/fake_mouse_cursor_monitor.h',
         'protocol/fake_authenticator.cc',
         'protocol/fake_authenticator.h',
         'protocol/fake_datagram_socket.cc',
@@ skipping 31 matching lines @@
           ],
           'sources/': [
             ['exclude', '^host/'],
           ]
         }],
       ],
     },
 
     # Remoting unit tests
     {
+      # GN version: //remoting:remoting_unittests
+      # Note that many of the sources are broken out into subdir-specific unit
+      # test source set targets that then GN version then brings together.
       'target_name': 'remoting_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:base_i18n',
         '../base/base.gyp:test_support_base',
         '../components/components.gyp:policy',
         '../ipc/ipc.gyp:ipc',
         '../net/net.gyp:net_test_support',
         '../ppapi/ppapi.gyp:ppapi_cpp',
@@ skipping 16 matching lines @@
         'remoting_resources',
         'remoting_test_common',
       ],
       'defines': [
         'VERSION=<(version_full)',
       ],
       'include_dirs': [
         '../testing/gmock/include',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'base/auth_token_util_unittest.cc',
         'base/auto_thread_task_runner_unittest.cc',
         'base/auto_thread_unittest.cc',
         'base/breakpad_win_unittest.cc',
         'base/buffered_socket_writer_unittest.cc',
         'base/capabilities_unittest.cc',
         'base/compound_buffer_unittest.cc',
         'base/rate_counter_unittest.cc',
         'base/resources_unittest.cc',
         'base/rsa_key_pair_unittest.cc',
@@ skipping 301 matching lines @@
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
             }],
           ],  # end of 'conditions'
         },  # end of target 'remoting_perftests'
       ]
     }]
   ]
 }