Prepare to add more initiator info to CachedResource(Request)

Source/core/loader/cache/CachedResourceInitiatorInfo.h

Index: Source/core/loader/cache/CachedResourceInitiatorInfo.h
diff --git a/Source/core/platform/network/DNS.h b/Source/core/loader/cache/CachedResourceInitiatorInfo.h
similarity index 80%
copy from Source/core/platform/network/DNS.h
copy to Source/core/loader/cache/CachedResourceInitiatorInfo.h
index 90d832e2a948ed4e0ca40ffb069787f213f333a5..8a967eff0928932ba438613c532be3ffe285bc7b 100644
--- a/Source/core/platform/network/DNS.h
+++ b/Source/core/loader/cache/CachedResourceInitiatorInfo.h
@@ -1,6 +1,5 @@
 /*
- * Copyright (C) 2008 Collin Jackson  <collinj@webkit.org>
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ * Copyright (C) 2013 Google, Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -11,7 +10,7 @@
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
@@ -24,14 +23,17 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef DNS_h
-#define DNS_h
+#ifndef CachedResourceInitiatorInfo_h
+#define CachedResourceInitiatorInfo_h
 
-#include <wtf/Forward.h>
+#include "wtf/text/AtomicString.h"
 
 namespace WebCore {
 
-void prefetchDNS(const String& hostname);
+struct CachedResourceInitiatorInfo {
+    AtomicString name;
+    double startTime;
+};
 
 } // namespace WebCore