Partially back-off CL:1264138 to use the fix in CL:823582

CL:823582 used ForceLayoutForCentering() which updates the dialog flat
tree distribution as a side-effect. Hence, the forced dialog flat tree
distribution update in CL:1264138 is now redundant and can be removed.

Covered by layout tests:
  html/dialog/showmodal-shadow-sibling-frame-crash.html
  html/dialog/dialog-show-modal-inert-crash.html

Covered by Chrome OS browser test:
  browser_tests --gtest_filter="QuickView*openQuickViewAudio"

Tbr: hayato-san
Bug: 891150, 789094, 804047
Change-Id: I84f5e0d29aab2c8956b689bb713a9c383471aa80
Reviewed-on: https://chromium-review.googlesource.com/c/1278075
Commit-Queue: Noel Gordon <noel@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599436}
1 file changed