Move GpuImpl into services/gles2

mojo/services/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/public/tools/bindings/mojom.gni")
 
 source_set("gles2") {
   sources = [
     "command_buffer_impl.cc",
     "command_buffer_impl.h",
+    "gpu_impl.cc",
+    "gpu_impl.h",
   ]
 
   public_deps = [ ":lib" ]
   deps = [
     "//base",
     "//gpu/command_buffer/service",
+    "//mojo/converters/geometry",
+    "//mojo/services/public/interfaces/geometry",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 }
 
 source_set("lib") {
   sources = [
     "command_buffer_type_conversions.cc",
     "command_buffer_type_conversions.h",
     "mojo_buffer_backing.cc",
     "mojo_buffer_backing.h",
   ]
 
   deps = [
     "//base",
     "//gpu/command_buffer/common",
     "//mojo/public/cpp/bindings",
     "//mojo/services/public/interfaces/gpu",
   ]
 }