[ABANDONED] Simplify ash shelf dimmer.

ash/aura/wm_shelf_aura.cc

Index: ash/aura/wm_shelf_aura.cc
diff --git a/ash/aura/wm_shelf_aura.cc b/ash/aura/wm_shelf_aura.cc
index 36adc0ea8165c7a002a111654964e9e4fcbd9795..a166d51a633272f3c337f5708a10884aad5cd8e8 100644
--- a/ash/aura/wm_shelf_aura.cc
+++ b/ash/aura/wm_shelf_aura.cc
@@ -88,10 +88,6 @@ ShelfBackgroundType WmShelfAura::GetBackgroundType() const {
   return shelf_layout_manager_->shelf_widget()->GetBackgroundType();
 }
 
-bool WmShelfAura::IsDimmed() const {
-  return shelf_layout_manager_->shelf_widget()->GetDimsShelf();
-}
-
 bool WmShelfAura::IsShowingOverflowBubble() const {
   return shelf_->IsShowingOverflowBubble();
 }