Remove unused parameters from LoadFontPromiseResolver
Remove unused parameters from LoadFontPromiseResolver

After r162940, LoadFontPromiseResolver::loaded() does not need Document.

TEST=none; no behavior changes.

Review URL: https://codereview.chromium.org/107373005

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@164525 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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