Replace ToLower calls to the new format

chrome/renderer/safe_browsing/phishing_dom_feature_extractor.cc

Index: chrome/renderer/safe_browsing/phishing_dom_feature_extractor.cc
diff --git a/chrome/renderer/safe_browsing/phishing_dom_feature_extractor.cc b/chrome/renderer/safe_browsing/phishing_dom_feature_extractor.cc
index f47a186a098cf937f290461cd67fb7db55c6580a..d5bda8e518a23ed6c9c103283e699aaea641d1d9 100644
--- a/chrome/renderer/safe_browsing/phishing_dom_feature_extractor.cc
+++ b/chrome/renderer/safe_browsing/phishing_dom_feature_extractor.cc
@@ -327,8 +327,7 @@ void PhishingDOMFeatureExtractor::HandleInput(
   // Note that we use the attribute value rather than
   // WebFormControlElement::formControlType() for consistency with the
   // way the phishing classification model is created.
-  std::string type = element.getAttribute("type").utf8();
-  base::StringToLowerASCII(&type);
+  std::string type = base::ToLowerASCII(element.getAttribute("type").utf8());
   if (type == "password") {
     ++page_feature_state_->num_pswd_inputs;
   } else if (type == "radio") {