Introduce content::PageState

content/public/common/common_param_traits.cc

Index: content/public/common/common_param_traits.cc
diff --git a/content/public/common/common_param_traits.cc b/content/public/common/common_param_traits.cc
index de32860dd45a0c62e31f8f89e315094175ecda79..f2a5c8a0e9d66798f1030cc6047a4ba0ad1872ee 100644
--- a/content/public/common/common_param_traits.cc
+++ b/content/public/common/common_param_traits.cc
@@ -5,6 +5,7 @@
 #include "content/public/common/common_param_traits.h"
 
 #include "content/public/common/content_constants.h"
+#include "content/public/common/page_state.h"
 #include "content/public/common/referrer.h"
 #include "net/base/host_port_pair.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ -106,6 +107,27 @@ void ParamTraits<net::HostPortPair>::Log(const param_type& p, std::string* l) {
   l->append(p.ToString());
 }
 
+void ParamTraits<content::PageState>::Write(
+    Message* m, const param_type& p) {
+  WriteParam(m, p.ToEncodedData());
+}
+
+bool ParamTraits<content::PageState>::Read(
+    const Message* m, PickleIterator* iter, param_type* r) {
+  std::string data;
+  if (!ReadParam(m, iter, &data))
+    return false;
+  *r = content::PageState::CreateFromEncodedData(data);
+  return true;
+}
+
+void ParamTraits<content::PageState>::Log(
+    const param_type& p, std::string* l) {
+  l->append("(");
+  LogParam(p.ToEncodedData(), l);
+  l->append(")");
+}
+
 void ParamTraits<content::Referrer>::Write(
     Message* m, const param_type& p) {
   WriteParam(m, p.url);