[ios] Adds a LocationBarController interface.

ios/shared/chrome/browser/ui/omnibox/location_bar_controller.cc

Index: ios/shared/chrome/browser/ui/omnibox/location_bar_controller.cc
diff --git a/ios/shared/chrome/browser/ui/omnibox/location_bar_controller.cc b/ios/shared/chrome/browser/ui/omnibox/location_bar_controller.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2b90e9cab968d4bdbce4fb5e1a244d12001c2700
--- /dev/null
+++ b/ios/shared/chrome/browser/ui/omnibox/location_bar_controller.cc
@@ -0,0 +1,9 @@
+// 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.
+
+#include "ios/shared/chrome/browser/ui/omnibox/location_bar_controller.h"
+
+LocationBarController::LocationBarController() {}
+
+LocationBarController::~LocationBarController() {}