Migrate Local Discovery from net::IPAddressNumber to net::IPAddress.

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 170caad9cc5e611e73dace12966977dc439442ef..e9904334e09a33c69de616003228d639cc87a189 100644
--- a/content/public/common/common_param_traits.h
+++ b/content/public/common/common_param_traits.h
@@ -36,6 +36,7 @@ class PageState;
 namespace net {
 class HostPortPair;
 class IPEndPoint;
+class IPAddress;
 }
 
 namespace IPC {
@@ -73,6 +74,14 @@ struct CONTENT_EXPORT ParamTraits<net::IPEndPoint> {
 };
 
 template <>
+struct CONTENT_EXPORT ParamTraits<net::IPAddress> {
+  typedef net::IPAddress param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, base::PickleIterator* iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
 struct CONTENT_EXPORT ParamTraits<content::PageState> {
   typedef content::PageState param_type;
   static void Write(Message* m, const param_type& p);