third_party/protobuf: Update to HEAD (f52e188fe4)

chrome/test/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/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 1884 matching lines @@
       "//chrome:strings",
       "//chrome/browser",
       "//chrome/renderer",
       "//components/autofill/content/browser:risk_proto",
       "//components/autofill/content/renderer:test_support",
       "//components/captive_portal:test_support",
       "//components/dom_distiller/content/browser",
       "//components/dom_distiller/content/renderer",
       "//components/dom_distiller/core:test_support",
       "//components/guest_view/browser:test_support",
-      "//components/policy:chrome_settings_proto",
+      "//components/policy:chrome_settings_proto_generated_compile",
       "//components/resources",
       "//components/safe_browsing_db:test_database_manager",
       "//components/strings",
       "//components/sync",
       "//components/translate/core/common",
       "//content/public/common:features",
       "//content/test:test_support",
       "//crypto:platform",
       "//crypto:test_support",
       "//device/bluetooth:mocks",
@@ skipping 3178 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }