Windows Chrome 66.0 failing tests

[xuset]

OSX Chrome 66.0 and Windows Chrome 65.0 pass the tests but Windows Chrome 66.0 fails some pretty trivial tests so this needs to be fixed

For now 279feb6 pins the Chrome version to 65.0 until this is sorted out.

[xuset]

Chrome 66 changed the storage quota algo that negatively affected devices with low storage capacity (like saucelabs vms) which caused the idb-kv-store tests to fail with a storage quota exceeded error when run on saucelabs chrome 66 vms. An issue was raised for Chromium and a fix seems to be coming in Chrome 67. Theres not much that can be done on idb-kv-stores side since it is at the mercy of the storage quota.