A bunch of remaining parts of extension content verification (Reland)

extensions/common/file_util.cc

Index: extensions/common/file_util.cc
diff --git a/extensions/common/file_util.cc b/extensions/common/file_util.cc
index fcf704bfc72fd7285ba79e6ff8c9ddd475725e24..0a116ad329570d9bc13e45fe366a5ae12126c4fc 100644
--- a/extensions/common/file_util.cc
+++ b/extensions/common/file_util.cc
@@ -437,5 +437,13 @@ std::map<std::string, std::string>* LoadMessageBundleSubstitutionMap(
   return return_value;
 }
 
+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