Closure Library v20190528

New Additions

• Added goog.asserts.assertExists, which asserts that a value is not null or undefined.
• Added a mode to goog.module.ModuleLoader to use <script> tags (with async=false) to download submodule code instead of xhr requests.

Backwards Incompatible Changes

• goog.define no longer exports global symbols. Instead it returns the value. This is the final step in making goog.define work in modules (cleanup).

Other Changes

• Fix an IE11 failure in Closure's sanitizer when templates are polyfilled
• Remove un-used LogSaver & Ensure closure compiler views require('goog.labs.net.webChannel.WebChannelBase') as side-effect free
• Add basic MIME parameter support in SafeUrl's sanitizers.
• Updates out-of-date docstring for cookies.remove().
• Preserved newlines in testrunner log output
• Fixed goog.testing.style.isVisible for detached elements.
• Improve the performance of the Closure Compiler transpiler when loaded with the debug loader.
• Ensure that the closure compiler views calls to goog.require('goog.math.Integer') as side-effect free.