Replace GURL in BudgetDatabase/BudgetManager with url::Origin
The Mojo service uses url::Origin, and that's the better way to be
storing origins, so converting over to using that instead of GURL. This
also does a bit of cleanup on the tests, which had a mix of methods which
took an origin argument and methods which created the origin internally.
Now the test has a member which is calculated once.
BUG=617971
Review-Url: https://codereview.chromium.org/2324133002
Cr-Commit-Position: refs/heads/master@{#417593}
8 files changed
