WebRtc Win Desktop capture: ignore Win8+ Modern Apps' windows.
WebRtc Win Desktop capture: ignore Win8+ Modern Apps' windows.

Microsoft introduced modern app from win8. Modern apps can be used cross Microsoft's platforms.

It was confirmed from Microsoft that there is no support for modern app's window capture.

BUG=526883

Review URL: https://codereview.webrtc.org/1371383003

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#10154}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 371dc7e5601f05015d4816ed2624cc8f5f01d19a

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