This is part of a change to convert all usages of 'var' with either
'let' or 'const'. This takes a conservative approach for 'const' where
it will only be used for aliases and storing the "original" values in
tests.
Change-Id: I475eba0a477d13cd9201c88ad44899d521ad8991
This plugin is preferred over the XHR plugin, if available.
This plugin requires AbortController, which is only present on
Firefox 57 and Edge 16, so this will not be active on every platform.
This also adds a simple mock for the Fetch API for use with Jasmine.
Closes#829
Change-Id: Ifb79d29334fbfcfd175afe0706da5a3d5e452e2f