[NTP::PhysicalWeb] Wire Physical Web provider to the data source.

components/ntp_snippets/physical_web_pages/fake_physical_web_data_source.cc

+// 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 "components/ntp_snippets/physical_web_pages/fake_physical_web_data_source.h"
+
+using base::Value;
+
+namespace ntp_snippets {
+
+FakePhysicalWebDataSource::FakePhysicalWebDataSource() = default;
+
+FakePhysicalWebDataSource::~FakePhysicalWebDataSource() = default;
+
+void FakePhysicalWebDataSource::StartDiscovery(bool network_request_enabled) {
+  NOTREACHED();
+}
+
+void FakePhysicalWebDataSource::StopDiscovery() {
+  NOTREACHED();
+}
+
+std::unique_ptr<base::ListValue> FakePhysicalWebDataSource::GetMetadata() {
+  return metadata_->CreateDeepCopy();
+}
+
+bool FakePhysicalWebDataSource::HasUnresolvedDiscoveries() {
+  NOTREACHED();
+  return false;
+}
+
+void FakePhysicalWebDataSource::RegisterListener(
+    PhysicalWebListener* physical_web_listener) {
+  // Ignored. Instead notify the provider directly.
+}
+
+void FakePhysicalWebDataSource::UnregisterListener(
+    PhysicalWebListener* physical_web_listener) {
+  // Ignored.
+}
+
+void FakePhysicalWebDataSource::SetMetadata(
+    std::unique_ptr<base::ListValue> metadata) {
+  metadata_ = std::move(metadata);
+}
+
+}  // namespace ntp_snippets