No need for UpdatePlaceholderVisibility on style change.

Calling UpdatePlaceholderVisibility on StyleDidChange makes us mark
style dirty in the middle of a layout tree rebuild.

Bug: 868810
Change-Id: I070e9fd576e21768099297767f2eddaaf401068c
Reviewed-on: https://chromium-review.googlesource.com/1205150Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588777}

third_party/blink/renderer/core/layout/layout_text_control.cc

@@ -67,7 +67,6 @@ void LayoutTextControl::StyleDidChange(StyleDifference diff,
       inner_editor_layout_object->InvalidateSelectedChildrenOnStyleChange();
     }
   }
-  GetTextControlElement()->UpdatePlaceholderVisibility();
 }
 
 int LayoutTextControl::TextBlockLogicalHeight() const {