RFR: 8261927: WebKit build fails with Visual Studio 2017

[Guru Hb]

On Thu, 18 Feb 2021 13:25:14 GMT, Arun Joseph <ajoseph at openjdk.org> wrote:

> The WebKit build fails with Visual Studio 2017.
> 
> Issue: Visual Studio 2017 doesn't support if constexpr in lambda
> 
> Test: Build webkit with the VS2017 compiler with and without this fix. It should fail without the fix and build with the fix.

Compiled and verified on VS 2017. Changes looks good to me.

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Marked as reviewed by ghb (Reviewer).

PR: https://git.openjdk.java.net/jfx/pull/405