RFR: 8242505: Some WebKit tests might fail because Microsoft libraries are not loaded

[Kevin Rushforth]

On Wed, 22 Apr 2020 18:07:53 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> This PR will allow javafx.web unit tests to run to completion and pass on Windows with Visual Studio 2019.
>> 
>> Two of the WebKit tests load the native WebKit library without initializing the JavaFX runtime. This will lead to test
>> failures and will hang the test run if those tests are run before the other tests, and if the system doesn't have all
>> the needed runtime libraries.   The simple fix is to call the Toolkit method to load those libraries. This is only
>> needed for unit tests that don't already initialize the JavaFX runtime (e.g., by calling `Platform::startup` or
>> `Application::launch`) and call internal methods that execute native code as part of the test.
>
> @guruhb can you review this?

Worth noting is that it is possible for this to fail even with the VS2017 compiler on some systems, but I haven't seen
it myself (I've seen similar enough failures to know that it's possible).

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PR: https://git.openjdk.java.net/jfx/pull/194