fix typos in StorageManager API (#2515)
fix typos in StorageManager API (#2515)

See https://chromium.googlesource.com/chromium/src/+/0b5bf0fd87c2dad9b2c7223a20f2b8b7756f3e57%5E%21/third_party/WebKit/Source/modules/quota/StorageManager.idl
mdn/browser-compat-data,chrisdavidmills/browser-compat-data,teoli2003/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data