Prevent static mojo builds from pulling //ui/gl into mojo_shell

mojo/shell/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")
 import("//build/config/ui.gni")
 
 executable("mojo_shell") {
   deps = [
     ":lib",
     "//base",
     "//mojo/common",
     "//mojo/environment:chromium",
-    "//ui/gfx",
   ]
 
   if (is_component_build) {
     deps += ["//ui/gl"]
   }
 
   sources = [
     "desktop/mojo_main.cc"
   ]
 }
@@ skipping 121 matching lines @@
     "shell_test_helper.cc",
     "shell_test_helper.h",
   ]
 
   deps = [
     ":lib",
     "//base:base_static",
     "//mojo/system",
   ]
 }