Convert remaining StringToLowerASCII to ToLowerASCII

net/spdy/spdy_http_utils.cc

Index: net/spdy/spdy_http_utils.cc
diff --git a/net/spdy/spdy_http_utils.cc b/net/spdy/spdy_http_utils.cc
index c7dcb38362d64863479feb972e7fd35e86569e7e..aab758aee599815d0b9d59177782ca41f7d33117 100644
--- a/net/spdy/spdy_http_utils.cc
+++ b/net/spdy/spdy_http_utils.cc
@@ -105,7 +105,7 @@ void CreateSpdyHeadersFromHttpRequest(const HttpRequestInfo& info,
 
   HttpRequestHeaders::Iterator it(request_headers);
   while (it.GetNext()) {
-    std::string name = base::StringToLowerASCII(it.name());
+    std::string name = base::ToLowerASCII(it.name());
     if (name == "connection" || name == "proxy-connection" ||
         name == "transfer-encoding" || name == "host") {
       continue;
@@ -173,7 +173,7 @@ void CreateSpdyHeadersFromHttpResponse(
   void* iter = NULL;
   std::string raw_name, value;
   while (response_headers.EnumerateHeaderLines(&iter, &raw_name, &value)) {
-    std::string name = base::StringToLowerASCII(raw_name);
+    std::string name = base::ToLowerASCII(raw_name);
     AddSpdyHeader(name, value, headers);
   }
 }