Gracefully handle nested frame detaches.

If a frame detach triggered a load cancellation that resulted in another
detach, the initiating detach operation wasn't quite prepared.

Address by checking for the completion of a frame detach after
detachment of the loader-specific operations (FrameLoader.)

R=haraken
BUG=452253

Review URL: https://codereview.chromium.org/923363002

git-svn-id: svn://svn.chromium.org/blink/trunk@190184 bbb929c8-8fbe-4397-9dbb-9b2b20218538
5 files changed
tree: bc1eb64465aba332a7804b4ae0ae312ec67a40ca
  1. third_party/