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This updates some of SitePerProcessBrowserTests, PointerLockBrowserTests, and TouchSelectionForCrossProcessFramesTests to use the new hit testing api.

Based on: https://chromium-review.googlesource.com/c/chromium/src/+/1071886

TBR=piman@chromium.org
TEST= SitePerProcessBrowserTests,
PointerLockBrowserTests,
TouchSelectionForCrossProcessFramesTests

Bug: 785986
Change-Id: Ic3d7aca3f214d0ca0c1952e1f29b84a5ac31e13c
Reviewed-on: https://chromium-review.googlesource.com/1082573
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566806}