Move the Dispatcher::EntrypointClass enum out of Dispatcher to its own file.

mojo/edk/system/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.
 
 import("../mojo_edk.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 29 matching lines @@
     "data_pipe_consumer_dispatcher.cc",
     "data_pipe_consumer_dispatcher.h",
     "data_pipe_impl.cc",
     "data_pipe_impl.h",
     "data_pipe_producer_dispatcher.cc",
     "data_pipe_producer_dispatcher.h",
     "dispatcher.cc",
     "dispatcher.h",
     "endpoint_relayer.cc",
     "endpoint_relayer.h",
+    "entrypoint_class.h",
     "handle.cc",
     "handle.h",
     "handle_signals_state.h",
     "handle_table.cc",
     "handle_table.h",
     "incoming_endpoint.cc",
     "incoming_endpoint.h",
     "ipc_support.cc",
     "ipc_support.h",
     "local_data_pipe_impl.cc",
@@ skipping 146 matching lines @@
     # TODO(vtl): Add separate test targets for this.
     "mojo/edk/util:perftests",
 
     "mojo/edk/base_edk",
     "mojo/edk/base_edk:test_base_edk",
     "mojo/edk/system/test",
     "mojo/edk/system/test:perf",
     "mojo/edk/test:test_support",
   ]
 }