Use a direct include of strings headers in webkit/, part 1.

webkit/common/appcache/appcache_interfaces.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 "webkit/common/appcache/appcache_interfaces.h"
 
 #include <set>
 
 #include "base/lazy_instance.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "googleurl/src/gurl.h"
 #include "net/url_request/url_request.h"
 
 namespace {
 
 base::LazyInstance<std::set<std::string> >::Leaky g_supported_schemes =
     LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
@@ skipping 100 matching lines @@
 bool IsMethodSupported(const std::string& method) {
   return (method == kHttpGETMethod) || (method == kHttpHEADMethod);
 }
 
 bool IsSchemeAndMethodSupported(const net::URLRequest* request) {
   return IsSchemeSupported(request->url()) &&
          IsMethodSupported(request->method());
 }
 
 }  // namespace appcache