Bug 1976779 - rsclientcerts: make each backend responsible for rate-limiting calls to find_objects r=jschanck
Before this patch, `rsclientcerts::manager` would rate-limit calls to
`find_objects` to once every 3 seconds because the underlying operation can be
time-consuming (in particular, on macOS and Windows, if there are many
certificates/keys available). On Android, keys aren't available until the user
selects one, which means that if a call to `find_objects` happened before the
selection prompt was shown (which is what happens) and the user chose one in
less than 3 seconds, the backend wouldn't search again, thus making it seem like
no keys were available, which would cause Firefox to not send a client
certificate. This patch makes each backend implementation responsible for this
rate-limiting, because only they know if it's appropriate to do so (in particular,
on Android, `find_objects` doesn't have the same performance concern as
on macOS and Windows because rather than searching for certificates and
keys, it asks `ClientAuthCertificateManager` for the cached list of certificates
and keys that have already been approved for use by the user).
Differential Revision: https://phabricator.services.mozilla.com/D257065
<!DOCTYPE html><!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --><metacharset="UTF-8"><title>Canvas test: 2d.canvas.context.invalid.args</title><scriptsrc="/resources/testharness.js"></script><scriptsrc="/resources/testharnessreport.js"></script><scriptsrc="/html/canvas/resources/canvas-tests.js"></script><linkrel="stylesheet"href="/html/canvas/resources/canvas-tests.css"><bodyclass="show_output"><h1>2d.canvas.context.invalid.args</h1><pclass="desc">Calling getContext with invalid arguments.</p><pclass="output">Actual output:</p><canvasid="c"class="output"width="100"height="50"><pclass="fallback">FAIL (fallback content)</p></canvas><ulid="d"></ul><script>vart=async_test("Calling getContext with invalid arguments.");_addTest(function(canvas,ctx){_assertSame(canvas.getContext(''),null,"canvas.getContext('')","null");_assertSame(canvas.getContext('2d#'),null,"canvas.getContext('2d#')","null");_assertSame(canvas.getContext('This is clearly not a valid context name.'),null,"canvas.getContext('This is clearly not a valid context name.')","null");_assertSame(canvas.getContext('2d\0'),null,"canvas.getContext('2d\\0')","null");_assertSame(canvas.getContext('2\uFF44'),null,"canvas.getContext('2\\uFF44')","null");_assertSame(canvas.getContext('2D'),null,"canvas.getContext('2D')","null");assert_throws_js(TypeError,function(){canvas.getContext();});_assertSame(canvas.getContext('null'),null,"canvas.getContext('null')","null");_assertSame(canvas.getContext('undefined'),null,"canvas.getContext('undefined')","null");});</script>