Pull SecurityStateModel out into a component

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")
+}
+
+# GYP version: components/security_state.gyp
+source_set("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) {
+  # GYP: //components/security_state.gypi:security_state_enums_java
+  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",
+  ]
+
+  data = [
+    "//net/data/",
+  ]
+}