[TabRefactoring] Remove notifyTab call from preload.

PreloadController is a webStateobserver and calls the notifyTab in
DidStartNavigation, But also Tab is a webStateObserver and does the same
logic in DidStartNavigation. There is no case where PreloadController
observer method will be called but tab isn't. So removing this call from
PreloadControlelr

Bug: 941052
Change-Id: Iab80c7159f229dc7165fdbec1f2f38194cbd7b2f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1518071
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Mohammad Refaat <mrefaat@chromium.org>
Cr-Commit-Position: refs/heads/master@{#640159}
1 file changed