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

chrome/common/extensions/manifest.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 "chrome/common/extensions/manifest.h"
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
-#include "base/stringprintf.h"
 #include "base/strings/string_split.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/features/base_feature_provider.h"
 #include "extensions/common/error_utils.h"
 #include "extensions/common/install_warning.h"
 
 namespace errors = extension_manifest_errors;
 namespace keys = extension_manifest_keys;
 
 namespace extensions {
@@ skipping 230 matching lines @@
       BaseFeatureProvider::GetByName("manifest")->GetFeature(key);
   if (!feature)
     return true;
 
   return feature->IsAvailableToManifest(
       extension_id_, type_, Feature::ConvertLocation(location_),
       GetManifestVersion()).is_available();
 }
 
 }  // namespace extensions