Generate param traits size methods for IPC files in content/ (and traits it depends on).

content/common/resource_messages.h

Index: content/common/resource_messages.h
diff --git a/content/common/resource_messages.h b/content/common/resource_messages.h
index 10edddf4151d35838166606aa3af0e042d9ac344..e7fa50eb4c7e2639cb7aadf1dc8dbb8ccccf1d5f 100644
--- a/content/common/resource_messages.h
+++ b/content/common/resource_messages.h
@@ -40,6 +40,7 @@ namespace IPC {
 template <>
 struct ParamTraits<scoped_refptr<net::HttpResponseHeaders> > {
   typedef scoped_refptr<net::HttpResponseHeaders> param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
@@ -50,6 +51,7 @@ struct ParamTraits<scoped_refptr<net::HttpResponseHeaders> > {
 template <>
 struct CONTENT_EXPORT ParamTraits<storage::DataElement> {
   typedef storage::DataElement param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
@@ -60,6 +62,7 @@ struct CONTENT_EXPORT ParamTraits<storage::DataElement> {
 template <>
 struct ParamTraits<scoped_refptr<content::ResourceDevToolsInfo> > {
   typedef scoped_refptr<content::ResourceDevToolsInfo> param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
@@ -70,6 +73,7 @@ struct ParamTraits<scoped_refptr<content::ResourceDevToolsInfo> > {
 template <>
 struct ParamTraits<net::LoadTimingInfo> {
   typedef net::LoadTimingInfo param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
@@ -80,6 +84,7 @@ struct ParamTraits<net::LoadTimingInfo> {
 template <>
 struct ParamTraits<scoped_refptr<content::ResourceRequestBody> > {
   typedef scoped_refptr<content::ResourceRequestBody> param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,