[NaCl SDK] Remove output_protection_private.{cc,h} from library.dsc.

native_client_sdk/src/libraries/ppapi_cpp_private/library.dsc

 {
   'TOOLS': ['newlib', 'glibc', 'pnacl', 'win', 'linux'],
   'SEARCH': [
       '../../../../ppapi/c/private',
       '../../../../ppapi/cpp/private',
   ],
   'TARGETS': [
     {
       'NAME' : 'ppapi_cpp_private',
       'TYPE' : 'lib',
       'SOURCES' : [
           'ext_crx_file_system_private.cc',
           'file_io_private.cc',
           'host_resolver_private.cc',
           'net_address_private.cc',
-          'output_protection_private.cc',
+          # TODO(binji): Remove comment when this file is added.
+          # 'output_protection_private.cc',
           'pass_file_handle.cc',
           'tcp_socket_private.cc',
           'tcp_server_socket_private.cc',
           'udp_socket_private.cc',
           'x509_certificate_private.cc',
       ],
     }
   ],
   'HEADERS': [
     # ppapi/c/private
@@ skipping 14 matching lines @@
       'DEST': 'include/ppapi/c/private',
     },
 
     # ppapi/cpp/private
     {
       'FILES': [
         'ext_crx_file_system_private.h',
         'file_io_private.h',
         'host_resolver_private.h',
         'net_address_private.h',
-        'output_protection_private.h',
+        # TODO(binji): Remove comment when this file is added.
+        # 'output_protection_private.h',
         'pass_file_handle.h',
         'tcp_server_socket_private.h',
         'tcp_socket_private.h',
         'udp_socket_private.h',
         'x509_certificate_private.h',
       ],
       'DEST': 'include/ppapi/cpp/private',
     },
   ],
   'DEST': 'src',
   'NAME': 'ppapi_cpp_private',
 }