Refactor SecurityStateModel/Clients for simplicity and reusability.

components/security_state/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.
-
-if (is_android) {
-  import("//build/config/android/config.gni")
-  import("//build/config/android/rules.gni")
-}
-
-static_library("security_state") {
-  sources = [
-    "security_state_model.cc",
-    "security_state_model.h",
-    "security_state_model_client.h",
-    "switches.cc",
-    "switches.h",
-  ]
-
-  deps = [
-    "//base",
-    "//net",
-  ]
-}
-
-if (is_android) {
-  java_cpp_enum("security_state_enums_java") {
-    sources = [
-      "security_state_model.h",
-    ]
-  }
-}
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "security_state_model_unittest.cc",
-  ]
-
-  deps = [
-    ":security_state",
-    "//net:test_support",
-    "//testing/gtest",
-  ]
-}