base: Add Is* functions to Value class.

jingle/glue/utils.cc

Index: jingle/glue/utils.cc
diff --git a/jingle/glue/utils.cc b/jingle/glue/utils.cc
index acdb302f1c905dbc7113126d6cfc3536154cf40b..9a6a1bb5a9daa8a8e639e0bb49f54292c2b9f31e 100644
--- a/jingle/glue/utils.cc
+++ b/jingle/glue/utils.cc
@@ -60,9 +60,8 @@ std::string SerializeP2PCandidate(const cricket::Candidate& candidate) {
 bool DeserializeP2PCandidate(const std::string& candidate_str,
                              cricket::Candidate* candidate) {
   scoped_ptr<Value> value(base::JSONReader::Read(candidate_str, true));
-  if (!value.get() || !value->IsType(Value::TYPE_DICTIONARY)) {
+  if (!value.get() || !value->IsDictionary())
     return false;
-  }
 
   DictionaryValue* dic_value = static_cast<DictionaryValue*>(value.get());