Move Extension Location and Type enums to Manifest, and move InstallWarning to its own file.

chrome/browser/extensions/permissions_updater_unittest.cc

Index: chrome/browser/extensions/permissions_updater_unittest.cc
diff --git a/chrome/browser/extensions/permissions_updater_unittest.cc b/chrome/browser/extensions/permissions_updater_unittest.cc
index 207183f4a76d43e4b734cf868855ace5fd5071b4..715c7fdd8b38df5f5ff6af0b379f585fd56be0e3 100644
--- a/chrome/browser/extensions/permissions_updater_unittest.cc
+++ b/chrome/browser/extensions/permissions_updater_unittest.cc
@@ -102,7 +102,7 @@ scoped_refptr<Extension> LoadManifest(std::string* error) {
     return NULL;
 
   scoped_refptr<Extension> extension = Extension::Create(
-      path.DirName(), Extension::INTERNAL,
+      path.DirName(), Manifest::INTERNAL,
       *static_cast<DictionaryValue*>(result.get()), Extension::NO_FLAGS, error);
   return extension;
 }