Revert of Convert network hints to Mojo

components/network_hints/common/network_hints_messages.cc

Index: components/network_hints/common/network_hints_messages.cc
diff --git a/components/network_hints/common/network_hints_messages.cc b/components/network_hints/common/network_hints_messages.cc
new file mode 100644
index 0000000000000000000000000000000000000000..27d035d1ed44e63c3a079acd3898461ebb0d4fb0
--- /dev/null
+++ b/components/network_hints/common/network_hints_messages.cc
@@ -0,0 +1,43 @@
+// Copyright 2014 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/network_hints/common/network_hints_messages.h"
+
+#include "base/strings/string_number_conversions.h"
+#include "components/network_hints/common/network_hints_common.h"
+
+namespace IPC {
+
+void ParamTraits<network_hints::LookupRequest>::Write(
+    base::Pickle* m,
+    const network_hints::LookupRequest& request) {
+  IPC::WriteParam(m, request.hostname_list);
+}
+
+bool ParamTraits<network_hints::LookupRequest>::Read(
+    const base::Pickle* m,
+    base::PickleIterator* iter,
+    network_hints::LookupRequest* request) {
+  // Verify the hostname limits after deserialization success.
+  if (IPC::ReadParam(m, iter, &request->hostname_list)) {
+    network_hints::NameList& hostnames = request->hostname_list;
+    if (hostnames.size() > network_hints::kMaxDnsHostnamesPerRequest)
+      return false;
+
+    for (const auto& hostname : hostnames) {
+      if (hostname.length() > network_hints::kMaxDnsHostnameLength)
+        return false;
+    }
+  }
+  return true;
+}
+
+void ParamTraits<network_hints::LookupRequest>::Log(
+    const network_hints::LookupRequest& p, std::string* l) {
+  l->append("<network_hints::LookupRequest: ");
+  l->append(base::SizeTToString(p.hostname_list.size()));
+  l->append(" hostnames>");
+}
+
+}  // namespace IPC