Reporting: Wrap existing classes in context.

net/reporting/reporting_delegate.cc

Index: net/reporting/reporting_delegate.cc
diff --git a/net/reporting/reporting_delegate.cc b/net/reporting/reporting_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cef5bafa28cb0ccd0ac11541bd345be5caee5fd6
--- /dev/null
+++ b/net/reporting/reporting_delegate.cc
@@ -0,0 +1,13 @@
+// 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 "net/reporting/reporting_delegate.h"
+
+namespace net {
+
+ReportingDelegate::~ReportingDelegate() {}
+
+ReportingDelegate::ReportingDelegate() {}
+
+}  // namespace net