Add a Physical Web data source

ios/chrome/browser/physical_web/create_physical_web_data_source.mm

Index: ios/chrome/browser/physical_web/create_physical_web_data_source.mm
diff --git a/ios/chrome/browser/physical_web/create_physical_web_data_source.mm b/ios/chrome/browser/physical_web/create_physical_web_data_source.mm
new file mode 100644
index 0000000000000000000000000000000000000000..17dab2a7eafdcdd25d27b0ed5b2795c741945510
--- /dev/null
+++ b/ios/chrome/browser/physical_web/create_physical_web_data_source.mm
@@ -0,0 +1,12 @@
+// 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.
+
+#include "ios/chrome/browser/physical_web/create_physical_web_data_source.h"
+
+#include "base/memory/ptr_util.h"
+#import "ios/chrome/common/physical_web/physical_web_data_source_ios.h"
+
+std::unique_ptr<PhysicalWebDataSource> CreatePhysicalWebDataSourceIOS() {
+  return base::WrapUnique(new PhysicalWebDataSourceIOS());
+}