Move //mojo/{public, edk} underneath //third_party

mojo/public/c/gles2/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_sdk.gni")
-
-config("gles2_config") {
-  defines = [ "GLES2_USE_MOJO" ]
-}
-
-group("gles2") {
-  public_configs = [ "//third_party/khronos:khronos_headers" ]
-  public_deps = [
-    ":headers",
-  ]
-  deps = [
-    "../../platform/native:gles2",
-  ]
-}
-
-mojo_sdk_source_set("headers") {
-  sources = [
-    "gles2.h",
-    "gles2_export.h",
-  ]
-
-  public_configs = [ ":gles2_config" ]
-
-  mojo_sdk_public_deps = [
-    "mojo/public/c/environment",
-    "mojo/public/c/system",
-  ]
-}