Convert remaining StringToLowerASCII to ToLowerASCII

media/blink/cache_util.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/blink/cache_util.h"
 
 #include <string>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 29 matching lines @@
   if (code == kHttpPartialContent &&
       !net::HttpUtil::HasStrongValidators(
           http_version,
           response.httpHeaderField("etag").utf8(),
           response.httpHeaderField("Last-Modified").utf8(),
           response.httpHeaderField("Date").utf8())) {
     reasons |= kNoStrongValidatorOnPartialResponse;
   }
 
   std::string cache_control_header =
-      response.httpHeaderField("cache-control").utf8();
-  base::StringToLowerASCII(&cache_control_header);
+      base::ToLowerASCII(response.httpHeaderField("cache-control").utf8());
   if (cache_control_header.find("no-cache") != std::string::npos)
     reasons |= kNoCache;
   if (cache_control_header.find("no-store") != std::string::npos)
     reasons |= kNoStore;
   if (cache_control_header.find("must-revalidate") != std::string::npos)
     reasons |= kHasMustRevalidate;
 
   const TimeDelta kMinimumAgeForUsefulness =
       TimeDelta::FromSeconds(3600);  // Arbitrary value.
 
@@ skipping 16 matching lines @@
                        &expires) &&
       date > Time() && expires > Time() &&
       (expires - date) < kMinimumAgeForUsefulness) {
     reasons |= kExpiresTooSoon;
   }
 
   return reasons;
 }
 
 }  // namespace media