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The underlying root cause for the bugs is that the javascript callbacks are not called for the handler cases where the cookies tree model is recreated.

Also made some misc minor fixes and substitution of deprecated calls.

Fixed: 795611,877082,1011734,845245
Change-Id: If94f701008dac9e0ddde3a85e7953b9b45f75934
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1851229
Commit-Queue: S. Ganesh <ganesh@chromium.org>
Reviewed-by: Dan Beam <dbeam@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704972}