Move services code brought in from Mojo to live under //third_party.

third_party/mojo_services/src/gpu/public/interfaces/gpu.mojom

 // 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.
 
 module mojo;
 
 import "geometry/public/interfaces/geometry.mojom";
 import "gpu/public/interfaces/command_buffer.mojom";
 import "gpu/public/interfaces/viewport_parameter_listener.mojom";
 
 interface Gpu {
   CreateOnscreenGLES2Context(uint64 native_viewport_id,
                              Size size,
                              CommandBuffer& gles2_client,
                              ViewportParameterListener? listener);
   CreateOffscreenGLES2Context(CommandBuffer& gles2_client);
 };