2 files changed, 11 insertions, 0 deletions
diff --git a/chrome/common/extensions/extension.cc b/chrome/common/extensions/extension.cc
index 9b74737..33baff8 100644
--- a/chrome/common/extensions/extension.cc
+++ b/chrome/common/extensions/extension.cc
@@ -12,6 +12,7 @@
 #include "base/string_util.h"
 #include "base/third_party/nss/blapi.h"
 #include "base/third_party/nss/sha256.h"
+#include "chrome/common/chrome_constants.h"
 #include "chrome/common/extensions/extension_error_reporter.h"
 #include "chrome/common/extensions/extension_error_utils.h"
 #include "chrome/common/extensions/user_script.h"
@@ -199,6 +200,13 @@ const std::string Extension::VersionString() const {
 }
 
 // static
+bool Extension::IsExtension(const FilePath& file_name) {
+  return file_name.MatchesExtension(
+      FilePath::StringType(FILE_PATH_LITERAL(".")) +
+      chrome::kExtensionFileExtension);
+}
+
+// static
 bool Extension::IdIsValid(const std::string& id) {
   // Verify that the id is legal.
   if (id.size() != (kIdSize * 2))
diff --git a/chrome/common/extensions/extension.h b/chrome/common/extensions/extension.h
index 1b774ae..ec14b0b 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -142,6 +142,9 @@ class Extension {
   explicit Extension(const FilePath& path);
   virtual ~Extension();
 
+  // Returns true if the specified file is an extension.
+  static bool IsExtension(const FilePath& file_name);
+
   // Resets the id counter. This is only useful for unit tests.
   static void ResetGeneratedIdCounter() {
     id_counter_ = 0;