Ensure correct state for resources fetched via fetch???Resource.
Ensure correct state for resources fetched via fetch???Resource.

This CL asserts that resources fetched via the various
'ResourceFetcher::fetch???Resource' methods have a frame-type of 'none'
and sets the request context as appropriate.

BUG=390497

Review URL: https://codereview.chromium.org/390833002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@178260 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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