Move FaviconAttributes to UI

ios/chrome/browser/ui/favicon/BUILD.gn

Index: ios/chrome/browser/ui/favicon/BUILD.gn
diff --git a/ios/chrome/browser/ui/favicon/BUILD.gn b/ios/chrome/browser/ui/favicon/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..539386b695c0847f766484e22975ed0af3fbef45
--- /dev/null
+++ b/ios/chrome/browser/ui/favicon/BUILD.gn
@@ -0,0 +1,17 @@
+# 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("favicon") {
+  sources = [
+    "favicon_attributes.h",
+    "favicon_attributes.mm",
+    "favicon_view.h",
+    "favicon_view.mm",
+  ]
+  deps = [
+    "//base",
+    "//ios/chrome/browser/ui",
+  ]
+  configs += [ "//build/config/compiler:enable_arc" ]
+}