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

chrome/common/extensions/permissions/permission_set_unittest.cc

Index: chrome/common/extensions/permissions/permission_set_unittest.cc
diff --git a/chrome/common/extensions/permissions/permission_set_unittest.cc b/chrome/common/extensions/permissions/permission_set_unittest.cc
index b5a8ded4d8e518d178c6cf7bc4587bf73bf7995e..209c07ea8c2f6cb730529ccdce3db67e096f5de3 100644
--- a/chrome/common/extensions/permissions/permission_set_unittest.cc
+++ b/chrome/common/extensions/permissions/permission_set_unittest.cc
@@ -46,7 +46,7 @@ scoped_refptr<Extension> LoadManifest(const std::string& dir,
   }
 
   scoped_refptr<Extension> extension = Extension::Create(
-      path.DirName(), Extension::INVALID,
+      path.DirName(), Manifest::INVALID_LOCATION,
       *static_cast<DictionaryValue*>(result.get()), extra_flags, &error);
   EXPECT_TRUE(extension) << error;
   return extension;