Distinguish null IDBKey (no value) and invalid IDBKey (value is not valid key)

content/common/indexed_db/indexed_db_param_traits.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/indexed_db/indexed_db_param_traits.h"
 
 #include "content/common/indexed_db/indexed_db_key.h"
 #include "content/public/common/serialized_script_value.h"
 #include "ipc/ipc_message_utils.h"
 
@@ skipping 44 matching lines @@
     case WebKit::WebIDBKey::StringType:
       WriteParam(m, p.string());
       return;
     case WebKit::WebIDBKey::DateType:
       WriteParam(m, p.date());
       return;
     case WebKit::WebIDBKey::NumberType:
       WriteParam(m, p.number());
       return;
     case WebKit::WebIDBKey::InvalidType:
-    default:
-      // TODO(jsbell): Remove "default" label once WebKit bug 76487 has rolled.
-      // http://crbug.com/110956
+    case WebKit::WebIDBKey::NullType:
       return;
   }
   NOTREACHED();
 }
 
 bool ParamTraits<IndexedDBKey>::Read(const Message* m,
                                      void** iter,
                                      param_type* r) {
   int type;
   if (!ReadParam(m, iter, &type))
@@ skipping 26 matching lines @@
       }
     case WebKit::WebIDBKey::NumberType:
       {
         double number;
         if (!ReadParam(m, iter, &number))
           return false;
         r->SetNumber(number);
         return true;
       }
     case WebKit::WebIDBKey::InvalidType:
-    default:
-      // TODO(jsbell): Remove "default" label once WebKit bug 76487 has rolled.
-      // http://crbug.com/110956
       r->SetInvalid();
       return true;
+    case WebKit::WebIDBKey::NullType:
+      r->SetNull();
+      return true;
   }
   NOTREACHED();
   return false;
 }
 
 void ParamTraits<IndexedDBKey>::Log(const param_type& p, std::string* l) {
   l->append("<IndexedDBKey>(");
   LogParam(int(p.type()), l);
   l->append(", ");
   l->append("[");
   std::vector<IndexedDBKey>::const_iterator it = p.array().begin();
   while (it != p.array().end()) {
     Log(*it, l);
     ++it;
     if (it != p.array().end())
       l->append(", ");
   }
   l->append("], ");
   LogParam(p.string(), l);
   l->append(", ");
   LogParam(p.date(), l);
   l->append(", ");
   LogParam(p.number(), l);
   l->append(")");
 }
 
 }  // namespace IPC