Revert "Teach PRESUBMIT.py how to run gn check for most of the mojo repo"

sky/engine/platform/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("//build/config/ui.gni")
 import("//sky/engine/build/scripts/scripts.gni")
 import("//sky/engine/config.gni")
 
 # Most targets in this file are private actions so use that as the default.
 visibility = [":*"]
@@ skipping 625 matching lines @@
     "BLINK_PLATFORM_IMPLEMENTATION=1",
     "INSIDE_BLINK",
   ]
 
   include_dirs = [
     "$root_gen_dir/sky",
   ]
 
   deps = [
     ":make_platform_generated",
-    "//base",
+    "//base:base",
     "//gpu/command_buffer/client:gles2_c_lib",
     "//mojo/application",
-    "//mojo/common",
+    "//mojo/common:common",
     "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
     "//mojo/public/cpp/utility",
     "//skia",
     "//sky/engine/platform/heap",
     "//sky/engine/wtf",
     "//third_party/harfbuzz-ng",
     "//third_party/iccjpeg",
     "//third_party/icu",
@@ skipping 147 matching lines @@
     # See https://bugs.webkit.org/show_bug.cgi?id=62916.
     # TODO(GYP)
     #'cflags': ['-marm'],
     #    'conditions': [
     #      ['OS=="android"', {
     #        'cflags!': ['-mthumb'],
     #      }],
     #    ],
   }
 }