**NOTFORLANDING** New link rel=prerender API

content/public/common/common_param_traits.h

Index: content/public/common/common_param_traits.h
diff --git a/content/public/common/common_param_traits.h b/content/public/common/common_param_traits.h
index 6afb2fd8f6eca81e1b4061ab3486e4f0dc6e8ec1..ed76242e9493c40822253d517db049a24fd949ad 100644
--- a/content/public/common/common_param_traits.h
+++ b/content/public/common/common_param_traits.h
@@ -8,7 +8,8 @@
 // 'base' project can be found in ipc/ipc_message_utils.h.  This file contains
 // specializations for types that are used by the content code, and which need
 // manual serialization code.  This is usually because they're not structs with
-// public members..
+// public members, or because the same type is being used in multiple
+// *_messages.h headers.
 
 #ifndef CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_H_
 #define CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_H_
@@ -25,10 +26,15 @@
 #include "net/url_request/url_request_status.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/surface/transport_dib.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebReferrerPolicy.h"
 #include "webkit/glue/resource_type.h"
 
 class SkBitmap;
 
+namespace content {
+struct Referrer;
+}
+
 namespace gfx {
 class Point;
 class Rect;
@@ -112,6 +118,14 @@ struct ParamTraits<base::PlatformFileInfo> {
 };
 
 template <>
+struct CONTENT_EXPORT ParamTraits<content::Referrer> {
+  typedef content::Referrer param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
 struct CONTENT_EXPORT ParamTraits<gfx::Point> {
   typedef gfx::Point param_type;
   static void Write(Message* m, const param_type& p);
@@ -233,6 +247,11 @@ struct SimilarTypeTraits<base::PlatformFileError> {
 };
 
 template <>
+struct CONTENT_EXPORT SimilarTypeTraits<WebKit::WebReferrerPolicy> {
+  typedef int Type;
+};
+
+template <>
 struct SimilarTypeTraits<content::PageTransition> {
   typedef int Type;
 };