Define parameter structs of resource messages out of resource_messages.h

content/common/resource_request_completion_status.cc

Index: content/common/resource_request_completion_status.cc
diff --git a/content/common/resource_request_completion_status.cc b/content/common/resource_request_completion_status.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4f2c850a08935dcd5d8104ae9b4fbe058f907bfd
--- /dev/null
+++ b/content/common/resource_request_completion_status.cc
@@ -0,0 +1,14 @@
+// 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 "content/common/resource_request_completion_status.h"
+
+namespace content {
+
+ResourceRequestCompletionStatus::ResourceRequestCompletionStatus() {}
+ResourceRequestCompletionStatus::ResourceRequestCompletionStatus(
+    const ResourceRequestCompletionStatus& status) = default;
+ResourceRequestCompletionStatus::~ResourceRequestCompletionStatus() {}
+
+}  // namespace content