Add the suggestions UI in chrome

ios/chrome/browser/content_suggestions/BUILD.gn

Index: ios/chrome/browser/content_suggestions/BUILD.gn
diff --git a/ios/chrome/browser/content_suggestions/BUILD.gn b/ios/chrome/browser/content_suggestions/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..8d1fcc4582cde7af17c4f7a14a521a709d69f912
--- /dev/null
+++ b/ios/chrome/browser/content_suggestions/BUILD.gn
@@ -0,0 +1,18 @@
+# Copyright 2017 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("content_suggestions") {
+  configs += [ "//build/config/compiler:enable_arc" ]
+  sources = [
+    "content_suggestions_coordinator.h",
+    "content_suggestions_coordinator.mm",
+  ]
+  deps = [
+    "//base",
+    "//ios/chrome/app/strings",
+    "//ios/chrome/browser",
+    "//ios/chrome/browser/ui/suggestions",
+    "//ui/base",
+  ]
+}