Previously in Browser, when we navigate back from a page that has an
icon to a page that does not have an icon, the icon does not update and
the old icon is displayed because FrameLoader does not set the default
favicon when the favicon cannot be loaded. This patch ensures that
Browser receives a new icon bitmap every time a load takes place.
Our "frame" concept very closely matches what the web specs call a
"browsing context", so let's rename it to that. :^)
The "main frame" becomes the "top-level browsing context",
and "sub-frames" are now "nested browsing contexts".
This prevents the browser from crashing when trying to load an infinite
redirects loop. The chosen limit is based on the fetch specification:
"If request's redirect count is twenty, return a network error."
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
