Introduce a layering in the invalidation component as public and impl

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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/module_args/v8.gni")
 import("//testing/test.gni")
@@ skipping 439 matching lines @@
             chrome_tests_gypi_values.test_support_sync_integration_sources,
             ".",
             "//chrome")
     public_deps = [
       "//chrome/browser",
     ]
     deps = [
       ":test_support",
       "//base",
       "//chrome",
-      "//components/invalidation",
-      "//components/invalidation:test_support",
+      "//components/invalidation/impl",
+      "//components/invalidation/impl:test_support",
       "//net",
       "//skia",
       "//sync",
       "//sync:test_support_sync_testserver",
       "//sync:test_support_sync_fake_server",
       "//ui/app_list:test_support",
     ]
 
     if (is_mac) {
       sources -= [
@@ skipping 1350 matching lines @@
     "//third_party/mojo/src/mojo/edk/system",
   ]
 
   if (!is_android && use_ash) {
     sources +=
         rebase_path(unit_gypi_values.chrome_test_support_unit_ash_sources,
                     ".",
                     "//chrome")
   }
 }