Introduce content::PageState

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 8e26b8b21cd069ed8eeab2320ea44ae27be7fd12..b8ae7364fc8fec08a249778e915a7bbb910518ed 100644
--- a/content/public/common/common_param_traits.h
+++ b/content/public/common/common_param_traits.h
@@ -25,6 +25,7 @@
 class SkBitmap;
 
 namespace content {
+class PageState;
 struct Referrer;
 }
 
@@ -59,6 +60,14 @@ struct CONTENT_EXPORT ParamTraits<net::HostPortPair> {
 };
 
 template <>
+struct CONTENT_EXPORT ParamTraits<content::PageState> {
+  typedef content::PageState 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<content::Referrer> {
   typedef content::Referrer param_type;
   static void Write(Message* m, const param_type& p);