Rename window.view to visualViewport

Renaming `view` to `visualViewport`. This is in response to potential
compat impact of `window.view`. See
https://github.com/WICG/ViewportAPI/issues/42

Bug: 595826
Change-Id: I9a8651cb5e877e2204b5dd84bdba8d423a389806
Reviewed-on: https://chromium-review.googlesource.com/546756
Commit-Queue: David Bokan <bokan@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#482492}
41 files changed