New Additions

• Add goog.html.trustedtypes.POLICY_NAME as a more specific alternative to goog.TRUSTED_TYPES_POLICY_NAME. (773acea1e20c2bed03208563f9fe67250cb0c57e)
• Adds goog.collections.iters.toArray() (7891002a76b5022e0d85e00c7ab4a8d0c64e146b)

Backwards Incompatible Changes

• goog.string.linkify.linkifyPlainTextAsHtml no longer accepts positional parameters: use the options bag instead. (f809765544b047b6682199f1c3b31eb7ab0548c2)
• Remove goog.defines for enforcing COOP in goog.window and using blank strings when opening blank windows. (ee29cd491869d2d664f8969467b287de3a97dfde)
• goog.collections.iters functions no longer pass element index to their callbacks. (c9bdc173e35c1a67189a7c40d23a1c2d97b07903, b55819dc727d0770db00cede0738bfb9fa378256)
• Make goog.window.openBlank compatible with strict CSP. This change is backwards-incompatible on IE11, where the loading message will no longer be displayed. (c17a287c40027c7d72a260e1c787bfb6ac143773)
• Remove HAS_W3C_BUTTON, HAS_W3C_EVENT_SUPPORT, SET_KEY_CODE_TO_PREVENT_DEFAULT, HAS_NAVIGATOR_ONLINE_PROPERTY, HAS_HTML5_NETWORK_EVENT_SUPPORT, and HTML5_NETWORK_EVENTS_FIRE_ON_BODY from goog.events.BrowserFeature (617b0ff74db4458d9dd42d62427e7bc7b001962f)
• goog.collections.iters.forEach parameter type is now Iterator (674f4bd2d5b52895d5dfdf06c381056c39d855c8)
• goog.iter functions now call #next on passed-in iterables/iterators, not nextValueOrThrow. (8e2982c4606cf8e7da6f9db2edbca29915cd5d07)

Other Changes

• Make goog.cssom.addCssText obtain nonce from correct document object. (577fd3e8485768f6112ea6b02da9dac457f33954)
• Load the destination of a module loader extra edge if the source of the edge has already been loaded. (72e2957d18223120dcc61a586900da4af678f97d)
• Delete deprecated goog.net.cookies. (67d06cf7b73c3e228916218c12a500c7c930c880)
• Ensure Closure DOM is compatible with a strict CSP by default. (d97ac0b6bfd7ef2f2a23eaadb45894d5f6e95b04)