Revert of Paint tab-loading throbbers into a ui::Layer.

chrome/browser/ui/views/tabs/tab_strip.cc

Index: chrome/browser/ui/views/tabs/tab_strip.cc
diff --git a/chrome/browser/ui/views/tabs/tab_strip.cc b/chrome/browser/ui/views/tabs/tab_strip.cc
index dc05ac759ca9f940efeb36192cd2da9a5abd9ec4..5269e9947f96702fd54e6fc6d967b17fed866020 100644
--- a/chrome/browser/ui/views/tabs/tab_strip.cc
+++ b/chrome/browser/ui/views/tabs/tab_strip.cc
@@ -1218,13 +1218,6 @@
     }
   }
   return true;
-}
-
-bool TabStrip::CanPaintThrobberToLayer() const {
-  // Disable layer-painting of throbbers if dragging, if any tab animation is in
-  // progress, or if stacked tabs are enabled.
-  const bool dragging = drag_controller_ && drag_controller_->started_drag();
-  return !touch_layout_ && !dragging && !IsAnimating();
 }
 
 bool TabStrip::IsImmersiveStyle() const {