Componentize renderer side of DNS prefetching.

components/predictor/common/predictor_common.cc

Index: components/predictor/common/predictor_common.cc
diff --git a/components/predictor/common/predictor_common.cc b/components/predictor/common/predictor_common.cc
new file mode 100644
index 0000000000000000000000000000000000000000..67d33834bff9efcb0471fef181cef388ca07452a
--- /dev/null
+++ b/components/predictor/common/predictor_common.cc
@@ -0,0 +1,12 @@
+// 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/predictor/common/predictor_common.h"
+
+namespace predictor {
+
+const size_t kMaxDnsHostnamesPerRequest = 30;
+const size_t kMaxDnsHostnameLength = 255;
+
+}  // namespace predictor