Restore classic login shelf kiosk app button color.

This addresses a change in this CL

https://chromium-review.googlesource.com/c/chromium/src/+/2382222

Bug: 1134854
Change-Id: I3970a260b534dabed6dd8bbba849812f5edfaddf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2462053Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Yulun Wu <yulunwu@chromium.org>
Commit-Queue: Yulun Wu <yulunwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815687}

ash/shelf/login_shelf_view.cc

@@ -304,10 +304,10 @@ class KioskAppsButton : public views::MenuButton,
     SetFocusPainter(nullptr);
     SetInkDropMode(InkDropMode::ON);
     SetHasInkDropActionOnClick(true);
-    AshColorProvider::RippleAttributes ripple_attributes =
-        AshColorProvider::Get()->GetRippleAttributes();
-    SetInkDropBaseColor(ripple_attributes.base_color);
-    SetInkDropVisibleOpacity(ripple_attributes.inkdrop_opacity);
+    SetInkDropBaseColor(
+        DeprecatedGetShelfInkDropBaseColor(kDefaultShelfInkDropColor));
+    SetInkDropVisibleOpacity(
+        DeprecatedGetShelfInkDropOpacity(kDefaultShelfInkDropOpacity));
 
     // Layer rendering is required when the shelf background is visible, which
     // happens when the wallpaper is not blurred.