Implement StructTraits for remaining IndexedDB IPC types.

content/common/indexed_db/indexed_db_param_traits.h

Index: content/common/indexed_db/indexed_db_param_traits.h
diff --git a/content/common/indexed_db/indexed_db_param_traits.h b/content/common/indexed_db/indexed_db_param_traits.h
index 1bbb8ac8008197df3bf0514ee68a87c416c9702b..f319071ee6d7bbc0d13c7fa905c96a0715626465 100644
--- a/content/common/indexed_db/indexed_db_param_traits.h
+++ b/content/common/indexed_db/indexed_db_param_traits.h
@@ -40,17 +40,6 @@ struct ParamTraits<content::IndexedDBKeyRange> {
   static void Log(const param_type& p, std::string* l);
 };
 
-template <>
-struct ParamTraits<content::IndexedDBKeyPath> {
-  typedef content::IndexedDBKeyPath 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,
-                   param_type* r);
-  static void Log(const param_type& p, std::string* l);
-};
-
 }  // namespace IPC
 
 #endif  // CONTENT_COMMON_INDEXED_DB_INDEXED_DB_PARAM_TRAITS_H_