Restructure public side of view_manager service.

mojo/services/public/interfaces/view_manager/BUILD.gn

Index: mojo/services/public/interfaces/view_manager/BUILD.gn
diff --git a/mojo/services/public/interfaces/view_manager/BUILD.gn b/mojo/services/public/interfaces/view_manager/BUILD.gn
deleted file mode 100644
index 10e7b43b6e9351824eb39e56686fd342e3916d53..0000000000000000000000000000000000000000
--- a/mojo/services/public/interfaces/view_manager/BUILD.gn
+++ /dev/null
@@ -1,20 +0,0 @@
-# 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/public/tools/bindings/mojom.gni")
-
-mojom("view_manager") {
-  sources = [
-    "animations.mojom",
-    "view_manager.mojom",
-    "view_manager_constants.mojom",
-  ]
-
-  deps = [
-    "//mojo/public/interfaces/application",
-    "//mojo/services/public/interfaces/geometry",
-    "//mojo/services/public/interfaces/input_events",
-    "//mojo/services/public/interfaces/surfaces:surface_id",
-  ]
-}