Add PPAPI decryptor implementation.

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_completion_callback.h',
@@ skipping 73 matching lines @@
       'c/dev/ppp_network_state_dev.h',
       'c/dev/ppp_scrollbar_dev.h',
       'c/dev/ppp_selection_dev.h',
       'c/dev/ppp_text_input_dev.h',
       'c/dev/ppp_video_decoder_dev.h',
       'c/dev/ppp_widget_dev.h',
       'c/dev/ppp_zoom_dev.h',
 
       # Private interfaces.
       'c/private/pp_file_handle.h',
+      'c/private/ppb_content_decryptor_private.h',
       'c/private/ppb_flash.h',
       'c/private/ppb_flash_clipboard.h',
       'c/private/ppb_flash_file.h',
       'c/private/ppb_flash_fullscreen.h',
       'c/private/ppb_flash_menu.h',
       'c/private/ppb_flash_message_loop.h',
       'c/private/ppb_flash_tcp_socket.h',
       'c/private/ppb_flash_udp_socket.h',
       'c/private/ppb_gpu_blacklist_private.h',
       'c/private/ppb_host_resolver_private.h',
       'c/private/ppb_instance_private.h',
       'c/private/ppb_nacl_private.h',
       'c/private/ppb_net_address_private.h',
       'c/private/ppb_pdf.h',
       'c/private/ppb_proxy_private.h',
       'c/private/ppp_instance_private.h',
       'c/private/ppb_network_list_private.h',
       'c/private/ppb_network_monitor_private.h',
       'c/private/ppb_tcp_server_socket_private.h',
       'c/private/ppb_tcp_socket_private.h',
       'c/private/ppb_udp_socket_private.h',
       'c/private/ppb_x509_certificate_private.h',
+      'c/private/ppp_content_decryptor_private.h',
 
       # Deprecated interfaces.
       'c/dev/deprecated_bool.h',
       'c/dev/ppb_var_deprecated.h',
       'c/dev/ppp_class_deprecated.h',
 
       # Trusted interfaces.
       'c/trusted/ppb_audio_trusted.h',
       'c/trusted/ppb_broker_trusted.h',
       'c/trusted/ppb_browser_font_trusted.h',
@@ skipping 120 matching lines @@
       'cpp/dev/widget_dev.cc',
       'cpp/dev/widget_dev.h',
       'cpp/dev/zoom_dev.cc',
       'cpp/dev/zoom_dev.h',
 
       # Deprecated interfaces.
       'cpp/dev/scriptable_object_deprecated.h',
       'cpp/dev/scriptable_object_deprecated.cc',
 
       # Private interfaces.
+      'cpp/private/content_decryptor_private.cc',
+      'cpp/private/content_decryptor_private.h',
       'cpp/private/flash.cc',
       'cpp/private/flash.h',
       'cpp/private/flash_clipboard.cc',
       'cpp/private/flash_clipboard.h',
       'cpp/private/flash_device_id.cc',
       'cpp/private/flash_device_id.h',
       'cpp/private/flash_file.cc',
       'cpp/private/flash_file.h',
       'cpp/private/flash_fullscreen.cc',
       'cpp/private/flash_fullscreen.h',
@@ skipping 189 matching lines @@
       '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',
     ],
   },
 }