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 2e424e5e34750dcdf938564abc841a6dde7f1117..1a8bdf11e6d9575c597a7419db9398d229587d47 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(), base::JSON_ALLOW_TRAILING_COMMAS));
+      header_bytes, base::JSON_ALLOW_TRAILING_COMMAS));
   if (header.get() == NULL)
     return NULL;