Provide script/gypi support for manifest generation

extensions/common/file_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 "extensions/common/file_util.h"
 
 #include <map>
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 137 matching lines @@
   std::vector<InstallWarning> warnings;
   if (!ValidateExtension(extension.get(), error, &warnings))
     return NULL;
   extension->AddInstallWarnings(warnings);
 
   return extension;
 }
 
 base::DictionaryValue* LoadManifest(const base::FilePath& extension_path,
                                     std::string* error) {
-  base::FilePath manifest_path = extension_path.Append(kManifestFilename);
+  return LoadManifest(extension_path, kManifestFilename, error);
+}
+
+base::DictionaryValue* LoadManifest(
+    const base::FilePath& extension_path,
+    const base::FilePath::CharType* manifest_filename,
+    std::string* error) {
+  base::FilePath manifest_path = extension_path.Append(manifest_filename);
   if (!base::PathExists(manifest_path)) {
     *error = l10n_util::GetStringUTF8(IDS_EXTENSION_MANIFEST_UNREADABLE);
     return NULL;
   }
 
   JSONFileValueSerializer serializer(manifest_path);
   scoped_ptr<base::Value> root(serializer.Deserialize(NULL, error));
   if (!root.get()) {
     if (error->empty()) {
       // If |error| is empty, than the file could not be read.
@@ skipping 271 matching lines @@
 base::FilePath GetVerifiedContentsPath(const base::FilePath& extension_path) {
   return extension_path.Append(kMetadataFolder)
       .Append(kVerifiedContentsFilename);
 }
 base::FilePath GetComputedHashesPath(const base::FilePath& extension_path) {
   return extension_path.Append(kMetadataFolder).Append(kComputedHashesFilename);
 }
 
 }  // namespace file_util
 }  // namespace extensions