Introduce url::Origin to represent Web Origin.

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 7c47ab53907ae1b3c38154e6392244cdedff7fae..b1e95cbd32e6a7845d87164cafcb6922f4b2e51f 100644
--- a/content/public/common/common_param_traits.cc
+++ b/content/public/common/common_param_traits.cc
@@ -4,6 +4,8 @@
 
 #include "content/public/common/common_param_traits.h"
 
+#include <string>
+
 #include "content/public/common/content_constants.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/referrer.h"
@@ -87,6 +89,27 @@ void ParamTraits<GURL>::Log(const GURL& p, std::string* l) {
   l->append(p.spec());
 }
 
+void ParamTraits<url::Origin>::Write(Message* m,
+                                          const url::Origin& p) {
+  m->WriteString(p.string());
+}
+
+bool ParamTraits<url::Origin>::Read(const Message* m,
+                                    PickleIterator* iter,
+                                    url::Origin* p) {
+  std::string s;
+  if (!m->ReadString(iter, &s)) {
+    *p = url::Origin();
+    return false;
+  }
+  *p = url::Origin(s);
+  return true;
+}
+
+void ParamTraits<url::Origin>::Log(const url::Origin& p, std::string* l) {
+  l->append(p.string());
+}
+
 void ParamTraits<net::HostPortPair>::Write(Message* m, const param_type& p) {
   WriteParam(m, p.host());
   WriteParam(m, p.port());