Use Mojo pipes to signal sync IPC events

mojo/mojo_public.gyp

 # Copyright 2014 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.
 
 {
   'includes': [
     'mojo_variables.gypi',
   ],
   'target_defaults' : {
     'include_dirs': [
@@ skipping 82 matching lines @@
     },
     {
       # GN version: //mojo/public/cpp/system
       'target_name': 'mojo_cpp_system',
       'type': 'static_library',
       'sources': [
         'public/cpp/system/buffer.cc',
         'public/cpp/system/buffer.h',
         'public/cpp/system/core.h',
         'public/cpp/system/data_pipe.h',
+        'public/cpp/system/event.cc',
+        'public/cpp/system/event.h',
         'public/cpp/system/functions.h',
         'public/cpp/system/handle.h',
         'public/cpp/system/message.h',
         'public/cpp/system/message_pipe.h',
         'public/cpp/system/platform_handle.cc',
         'public/cpp/system/platform_handle.h',
         'public/cpp/system/watcher.cc',
         'public/cpp/system/watcher.h',
       ],
       'dependencies': [
@@ skipping 82 matching lines @@
         'public/cpp/bindings/lib/serialization_context.h',
         'public/cpp/bindings/lib/serialization_forward.h',
         'public/cpp/bindings/lib/serialization_forward.h',
         'public/cpp/bindings/lib/serialization_util.cc',
         'public/cpp/bindings/lib/serialization_util.h',
         'public/cpp/bindings/lib/shared_data.h',
         'public/cpp/bindings/lib/shared_ptr.h',
         'public/cpp/bindings/lib/string_serialization.h',
         'public/cpp/bindings/lib/string_traits_string16.cc',
         'public/cpp/bindings/lib/sync_handle_registry.cc',
-        'public/cpp/bindings/lib/sync_handle_registry.h',
         'public/cpp/bindings/lib/sync_handle_watcher.cc',
         'public/cpp/bindings/lib/sync_handle_watcher.h',
         'public/cpp/bindings/lib/validate_params.h',
         'public/cpp/bindings/lib/validation_errors.cc',
         'public/cpp/bindings/lib/validation_errors.h',
         'public/cpp/bindings/lib/validation_util.cc',
         'public/cpp/bindings/lib/validation_util.h',
         'public/cpp/bindings/map_traits.h',
         'public/cpp/bindings/map_traits_standard.h',
         'public/cpp/bindings/map_traits_stl.h',
         'public/cpp/bindings/message.h',
         'public/cpp/bindings/message_filter.h',
         'public/cpp/bindings/native_struct.h',
         'public/cpp/bindings/no_interface.h',
         'public/cpp/bindings/scoped_interface_endpoint_handle.h',
         'public/cpp/bindings/stl_converters.h',
         'public/cpp/bindings/string.h',
         'public/cpp/bindings/string_traits.h',
         'public/cpp/bindings/string_traits_standard.h',
         'public/cpp/bindings/string_traits_stl.h',
         'public/cpp/bindings/string_traits_string16.h',
         'public/cpp/bindings/string_traits_string_piece.h',
         'public/cpp/bindings/strong_binding.h',
         'public/cpp/bindings/struct_ptr.h',
+        'public/cpp/bindings/sync_handle_registry.h',
         'public/cpp/bindings/type_converter.h',
         # This comes from the mojo_interface_bindings_cpp_sources dependency.
         '>@(mojom_generated_sources)',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         'mojo_cpp_system',
         'mojo_interface_bindings_cpp_sources',
       ],
     },
@@ skipping 292 matching lines @@
              'mojo_interface_bindings_java_sources',
              'mojo_public_java',
              '<(DEPTH)/base/base.gyp:base_java',
            ],
            'includes': [ '../build/java.gypi' ],
         },
       ],
     }],
   ],
 }