Add C++ wrappers for output parameters.

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 108 matching lines @@
       'c/trusted/ppb_browser_font_trusted.h',
       'c/trusted/ppb_buffer_trusted.h',
       'c/trusted/ppb_file_chooser_trusted.h',
       'c/trusted/ppb_file_io_trusted.h',
       'c/trusted/ppb_graphics_3d_trusted.h',
       'c/trusted/ppb_image_data_trusted.h',
       'c/trusted/ppb_url_loader_trusted.h',
       'c/trusted/ppp_broker.h',
     ],
     'cpp_source_files': [
+      'cpp/array_output.cc',
+      'cpp/array_output.h',
       'cpp/audio.cc',
       'cpp/audio.h',
       'cpp/audio_config.cc',
       'cpp/audio_config.h',
       'cpp/completion_callback.cc',
       'cpp/completion_callback.h',
       'cpp/core.cc',
       'cpp/core.h',
       'cpp/file_io.cc',
       'cpp/file_io.h',
@@ skipping 16 matching lines @@
       'cpp/instance.cc',
       'cpp/instance.h',
       'cpp/instance_handle.cc',
       'cpp/instance_handle.h',
       'cpp/logging.h',
       'cpp/module.cc',
       'cpp/module.h',
       'cpp/module_impl.h',
       'cpp/mouse_lock.cc',
       'cpp/mouse_lock.h',
+      'cpp/output_traits.h',
       'cpp/point.h',
       'cpp/rect.cc',
       'cpp/rect.h',
       'cpp/resource.cc',
       'cpp/resource.h',
       'cpp/size.h',
       'cpp/url_loader.cc',
       'cpp/url_loader.h',
       'cpp/url_request_info.cc',
       'cpp/url_request_info.h',
@@ skipping 272 matching lines @@
           'c/dev/ppb_transport_dev.h',
         ],
         'cpp_source_files': [
           'cpp/dev/transport_dev.cc',
           'cpp/dev/transport_dev.h',
         ],
       },
     }],
   ],
 }