Add ppapi, improve Windows GN build.

ppapi/ppapi_sources.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.
 
 {
   'variables': {
     'c_source_files': [
       'c/pp_array_output.h',
       'c/pp_bool.h',
       'c/pp_codecs.h',
@@ skipping 521 matching lines @@
     # Sources used in trusted tests.
     #
     'test_trusted_source_files': [
       # Test cases (PLEASE KEEP THIS SECTION IN ALPHABETICAL ORDER)
       'tests/test_broker.cc',
       'tests/test_broker.h',
       'tests/test_browser_font.cc',
       'tests/test_browser_font.h',
       'tests/test_buffer.cc',
       'tests/test_buffer.h',
-      'tests/test_c_includes.c',
       'tests/test_char_set.cc',
       'tests/test_char_set.h',
-      'tests/test_cpp_includes.cc',
       'tests/test_crypto.cc',
       'tests/test_crypto.h',
       'tests/test_flash.cc',
       'tests/test_flash.h',
       'tests/test_flash_clipboard.cc',
       'tests/test_flash_clipboard.h',
       'tests/test_flash_drm.cc',
       'tests/test_flash_drm.h',
       'tests/test_flash_file.cc',
       'tests/test_flash_file.h',
       'tests/test_flash_fullscreen.cc',
       'tests/test_flash_fullscreen.h',
       'tests/test_flash_message_loop.cc',
       'tests/test_flash_message_loop.h',
       'tests/test_net_address_private.cc',
       'tests/test_net_address_private.h',
       'tests/test_pdf.cc',
       'tests/test_pdf.h',
       'tests/test_platform_verification_private.cc',
       'tests/test_platform_verification_private.h',
-      'tests/test_struct_sizes.c',
       'tests/test_talk_private.cc',
       'tests/test_talk_private.h',
       'tests/test_tcp_socket_private_trusted.cc',
       'tests/test_tcp_socket_private_trusted.h',
       'tests/test_url_util.cc',
       'tests/test_url_util.h',
-      'tests/test_utils.cc',
       'tests/test_utils.h',
       'tests/test_video_decoder_dev.cc',
       'tests/test_video_decoder_dev.h',
       'tests/test_x509_certificate_private.cc',
       'tests/test_x509_certificate_private.h',
 
       # Deprecated test cases.
       'tests/test_instance_deprecated.cc',
       'tests/test_instance_deprecated.h',
       'tests/test_var_deprecated.cc',
       'tests/test_var_deprecated.h',
     ],
   },
 }