Refactor SecurityStateModel/Clients for simplicity and reusability.

components/security_state/ios/BUILD.gn

 # Copyright 2016 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.
 
-source_set("input_devices") {
+static_library("ios") {
   sources = [
-    "input_device_client.cc",
-    "input_device_client.h",
+    "ios_security_state_model.h",
+    "ios_security_state_model.mm",
+  ]
+
+  public_deps = [
+    "//components/security_state/core",
   ]
 
   deps = [
     "//base",
-    "//services/service_manager/public/cpp",
-    "//ui/events/devices",
-  ]
-
-  public_deps = [
-    "//services/ui/public/interfaces/input_devices",
+    "//ios/web",
+    "//net",
+    "//third_party/WebKit/public:blink_headers",
+    "//ui/base",
   ]
 }