Gracefully handle mixed content checking on detached resource fetches.

Do not assume the presence of a frame() when performing the mixed content
checks in ResourceFetcher::canRequest().

R=mkwst@chromium.org
BUG=461225

Review URL: https://codereview.chromium.org/995783002

git-svn-id: svn://svn.chromium.org/blink/trunk@191636 bbb929c8-8fbe-4397-9dbb-9b2b20218538
11 files changed
tree: f5026576f6778f4b1c9989e348ebe594df83ef9b
  1. third_party/