Revert of Content "gn check" work.

ppapi/shared_impl/BUILD.gn

 # Copyright 2015 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/nacl/config.gni")
 
 component("shared_impl") {
   output_name = "ppapi_shared"
 
   sources = [
@@ skipping 189 matching lines @@
 source_set("test_support") {
   testonly = true
 
   sources = [
     "test_globals.cc",
     "test_globals.h",
     "test_utils.cc",
     "test_utils.h",
   ]
 
-  public_deps = [
-    "//ppapi/shared_impl",
-  ]
   deps = [
     "//base/test:test_support",
     "//ipc",
     "//ipc:test_support",
     "//ppapi/proxy",
+    "//ppapi/shared_impl",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }