Correct create_unmask_prompt_view.h ref to create_card_unmask_prompt_view.h

The file create_card_unmask_prompt_view.h was added with
https://codereview.chromium.org/1138653003/
982b06f6e72d19b019676c8f51c6a8f63e580c19 but was added to
chrome_browser_ui.gypi as create_unmask_prompt_view.h.

Review URL: https://codereview.chromium.org/1156193002

Cr-Commit-Position: refs/heads/master@{#331450}
1 file changed