Rename RootViewManager to DisplayManager

mojo/services/view_manager/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/system.gni")
 
 # GYP version: mojo/mojo_services.gypi:mojo_view_manager
 component("view_manager") {
   deps = [
     "//base",
@@ skipping 25 matching lines @@
     "MOJO_VIEW_MANAGER_IMPLEMENTATION",
   ]
 
   sources = [
     "access_policy.h",
     "access_policy_delegate.h",
     "context_factory_impl.cc",
     "context_factory_impl.h",
     "default_access_policy.cc",
     "default_access_policy.h",
+    "display_manager.cc",
+    "display_manager.h",
+    "display_manager_delegate.h",
     "ids.h",
     "main.cc",
     "node.cc",
     "node.h",
     "node_delegate.h",
     "root_node_manager.cc",
     "root_node_manager.h",
-    "root_view_manager.cc",
-    "root_view_manager.h",
-    "root_view_manager_delegate.h",
     "screen_impl.cc",
     "screen_impl.h",
     "view_manager_export.h",
     "view_manager_init_service_context.cc",
     "view_manager_init_service_context.h",
     "view_manager_init_service_impl.cc",
     "view_manager_init_service_impl.h",
     "view_manager_service_impl.cc",
     "view_manager_service_impl.h",
     "window_manager_access_policy.cc",
@@ skipping 27 matching lines @@
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 
   sources = [
     "test_change_tracker.cc",
     "test_change_tracker.h",
     "view_manager_unittest.cc",
   ]
 }