WIP POC blob transport over mojo

content/common/content_param_traits.h

Index: content/common/content_param_traits.h
diff --git a/content/common/content_param_traits.h b/content/common/content_param_traits.h
index 6cd7d9251a94f08458e0bc88b79e24b1d840a6ba..4abd34087bd44ba2a8a1d4a176e804692219478c 100644
--- a/content/common/content_param_traits.h
+++ b/content/common/content_param_traits.h
@@ -18,6 +18,7 @@
 #include "content/common/cursors/webcursor.h"
 #include "ipc/ipc_mojo_param_traits.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
+#include "third_party/WebKit/public/platform/blobs.mojom.h"
 
 namespace content {
 class AccessibilityMode;
@@ -74,6 +75,17 @@ struct CONTENT_EXPORT ParamTraits<content::AccessibilityMode> {
   static void Log(const param_type& p, std::string* l);
 };
 
+template <>
+struct CONTENT_EXPORT ParamTraits<storage::mojom::BlobPtr> {
+  typedef storage::mojom::BlobPtr param_type;
+  static void GetSize(base::PickleSizer* sizer, const param_type& p);
+  static void Write(base::Pickle* m, const param_type& p);
+  static bool Read(const base::Pickle* m,
+                   base::PickleIterator* iter,
+                   param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
 }  // namespace IPC
 
 #endif  // CONTENT_COMMON_CONTENT_PARAM_TRAITS_H_