Revert of Mojo C++ bindings: support sync methods - part 2

mojo/public/cpp/bindings/BUILD.gn

 # 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.
 
 source_set("bindings") {
   sources = [
     "array.h",
     "associated_binding.h",
     "associated_group.h",
     "associated_interface_ptr.h",
@@ skipping 48 matching lines @@
     "lib/pipe_control_message_handler.h",
     "lib/pipe_control_message_handler_delegate.h",
     "lib/pipe_control_message_proxy.cc",
     "lib/pipe_control_message_proxy.h",
     "lib/router.cc",
     "lib/router.h",
     "lib/scoped_interface_endpoint_handle.cc",
     "lib/scoped_interface_endpoint_handle.h",
     "lib/string_serialization.cc",
     "lib/string_serialization.h",
-    "lib/sync_handle_watcher.cc",
-    "lib/sync_handle_watcher.h",
     "lib/union_accessor.h",
     "lib/validate_params.h",
     "lib/validation_errors.cc",
     "lib/validation_errors.h",
     "lib/validation_util.cc",
     "lib/validation_util.h",
     "lib/value_traits.h",
     "map.h",
     "message.h",
     "message_filter.h",
@@ skipping 29 matching lines @@
     "lib/shared_data.h",
     "lib/shared_ptr.h",
     "lib/template_util.h",
   ]
 
   deps = [
     "//base",
     "//mojo/public/cpp/system",
   ]
 }