Update JSONReader to take base::StringPiece instead of std::string

net/base/crl_set.cc

Index: net/base/crl_set.cc
diff --git a/net/base/crl_set.cc b/net/base/crl_set.cc
index 76d6bc36235e7c9021a1ad5c823b4742fa40fc1c..2b71cabe95d20507963780d24d473715e31738a9 100644
--- a/net/base/crl_set.cc
+++ b/net/base/crl_set.cc
@@ -138,7 +138,7 @@ static base::DictionaryValue* ReadHeader(base::StringPiece* data) {
   data->remove_prefix(header_len);
 
   scoped_ptr<Value> header(base::JSONReader::Read(
-      header_bytes.as_string(), true /* allow trailing comma */));
+      header_bytes, true /* allow trailing comma */));
   if (header.get() == NULL)
     return NULL;