Simplify the thunk targets since we don't support apps as components

mojo/services/public/cpp/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.
 
 source_set("view_manager") {
   sources = [
     "lib/view.cc",
     "lib/view_manager_client_factory.cc",
     "lib/view_manager_client_impl.cc",
     "lib/view_manager_client_impl.h",
@@ skipping 10 matching lines @@
     "view_property.h",
     "view_tracker.cc",
     "view_tracker.h",
   ]
 
   public_deps = [
     ":common",
   ]
   deps = [
     "//base",
-    "//mojo/public/c/gles2",
+    "//mojo/public/c/gles2:headers",
     "//mojo/public/cpp/application",
     "//mojo/public/cpp/bindings:bindings",
     "//mojo/public/interfaces/application",
     "//mojo/services/public/interfaces/geometry",
     "//mojo/services/public/interfaces/input_events:input_events",
     "//mojo/services/public/interfaces/surfaces:surface_id",
     "//mojo/services/public/interfaces/view_manager",
     "//mojo/services/public/interfaces/window_manager",
   ]
 }
 
 source_set("common") {
   sources = [
     "types.h",
   ]
 }