Mojo: (Theoretically) implement the read side of platform handle passing.

mojo/mojo.gyp

 # Copyright 2013 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.
 
 {
   'target_defaults': {
     'conditions': [
       ['mojo_shell_debug_url != ""', {
         'defines': [
           'MOJO_SHELL_DEBUG=1',
@@ skipping 133 matching lines @@
         'embedder/embedder.cc',
         'embedder/embedder.h',
         'embedder/platform_channel_pair.cc',
         'embedder/platform_channel_pair.h',
         'embedder/platform_channel_pair_posix.cc',
         'embedder/platform_channel_pair_win.cc',
         'embedder/platform_channel_utils_posix.cc',
         'embedder/platform_channel_utils_posix.h',
         'embedder/platform_handle.cc',
         'embedder/platform_handle.h',
+        'embedder/platform_handle_vector.cc',
+        'embedder/platform_handle_vector.h',
         'embedder/scoped_platform_handle.h',
         'system/channel.cc',
         'system/channel.h',
         'system/constants.h',
         'system/core.cc',
         'system/core.h',
         'system/data_pipe.cc',
         'system/data_pipe.h',
         'system/data_pipe_consumer_dispatcher.cc',
         'system/data_pipe_consumer_dispatcher.h',
@@ skipping 711 matching lines @@
             'aura/screen_mojo.cc',
             'aura/screen_mojo.h',
             'aura/window_tree_host_mojo.cc',
             'aura/window_tree_host_mojo.h',
           ],
         },
       ],
     }],
   ],
 }