[ios] Adds code for Omaha and the upgrade center.

ios/chrome/browser/omaha/BUILD.gn

Index: ios/chrome/browser/omaha/BUILD.gn
diff --git a/ios/chrome/browser/omaha/BUILD.gn b/ios/chrome/browser/omaha/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..ec365d7d4f48cab13ec3de96c837ecb6b474435d
--- /dev/null
+++ b/ios/chrome/browser/omaha/BUILD.gn
@@ -0,0 +1,53 @@
+# 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("omaha") {
+  sources = [
+    "omaha_service.h",
+    "omaha_service.mm",
+  ]
+  deps = [
+    "//base",
+    "//base:i18n",
+    "//components/metrics",
+    "//components/prefs",
+    "//components/profile_metrics",
+    "//components/version_info",
+    "//ios/chrome/browser",
+    "//ios/chrome/browser/browser_state:browser_state_impl",
+    "//ios/chrome/browser/browser_state_metrics",
+    "//ios/chrome/browser/ui",
+    "//ios/chrome/browser/upgrade",
+    "//ios/chrome/common",
+    "//ios/public/provider/chrome/browser",
+    "//ios/public/provider/chrome/browser/omaha",
+    "//ios/web",
+    "//net",
+    "//third_party/libxml",
+    "//url",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "omaha_service_unittest.mm",
+  ]
+  deps = [
+    ":omaha",
+    "//base",
+    "//components/metrics",
+    "//components/prefs",
+    "//components/version_info",
+    "//ios/chrome/browser",
+    "//ios/chrome/browser/browser_state:test_support",
+    "//ios/chrome/common",
+    "//ios/chrome/test:test_support",
+    "//ios/public/provider/chrome/browser",
+    "//ios/public/provider/chrome/browser/omaha",
+    "//ios/web:test_support",
+    "//net:test_support",
+    "//testing/gtest",
+  ]
+}