Fix Alt-PrintScreen, Hanja,Han/Yeong keys in Korean layout on Windows
Fix Alt-PrintScreen, Hanja,Han/Yeong keys in Korean layout on Windows

Windows generates unique scan codes for certain key combinations.
Since the corresponding physical keys have multiple scan code
definitions map them before the NativeKeyCode table that has
a 1:1 mapping.

BUG=542577

Review URL: https://codereview.chromium.org/1416333002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#355640}

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