Convert remaining StringToLowerASCII to ToLowerASCII

content/child/npapi/plugin_host.cc

 // Copyright (c) 2012 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 "content/child/npapi/plugin_host.h"
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 253 matching lines @@
           // If the name field is empty, we'll skip this header
           // but we won't error out.
           if (!name.empty() && name != "content-length") {
             names->push_back(name);
             values->push_back(value);
           }
           start = ptr + 1;
           break;
         case GETVALUE:
           // Got a header.
-          name = base::StringToLowerASCII(std::string(start, ptr - start));
+          name = base::ToLowerASCII(base::StringPiece(start, ptr - start));
           base::TrimWhitespace(name, base::TRIM_ALL, &name);
           start = ptr + 1;
           break;
         case GETDATA: {
           // Finished headers, now get body
           if (*ptr)
             start = ptr + 1;
           size_t previous_size = body->size();
           size_t new_body_size = length - static_cast<int>(start - buf);
           body->resize(previous_size + new_body_size);
@@ skipping 813 matching lines @@
 }
 
 void NPN_URLRedirectResponse(NPP instance, void* notify_data, NPBool allow) {
   scoped_refptr<PluginInstance> plugin(FindInstance(instance));
   if (plugin.get()) {
     plugin->URLRedirectResponse(!!allow, notify_data);
   }
 }
 
 }  // extern "C"