[CI] Remove "window." prefix in layout tests for test_shell injected global names

This doesn't include those in 'if' statements.

Bug: 703768
TBR: already agreed in blink-dev; too many files.
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_layout_ng
Change-Id: I499b91695e177d2a498d96cf20537ee146e22d06
Reviewed-on: https://chromium-review.googlesource.com/1057947
Reviewed-by: Xianzhu Wang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#558467}
1399 files changed