Update mojo sdk to rev f6c8ec07c01deebc13178d516225fd12695c3dc2

mojo/public/cpp/test_support/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")
+
 # GYP version: mojo/public/mojo_public.gyp:mojo_public_test_utils
-source_set("test_utils") {
+mojo_sdk_source_set("test_utils") {
   testonly = true
-  deps = [
-    "//base",
-    "//mojo/public/c/test_support",
-    "//mojo/public/cpp/system",
-    "//testing/gtest",
-  ]
 
   sources = [
     "lib/test_support.cc",
     "lib/test_utils.cc",
     "test_utils.h",
   ]
+
+  deps = [
+    "//testing/gtest",
+  ]
+
+  mojo_sdk_deps = [
+    "mojo/public/c/test_support",
+    "mojo/public/cpp/system",
+  ]
 }