Restore classic login shelf ink drop.

This addresses changes in:

https://chromium-review.googlesource.com/c/chromium/src/+/2406934

not addressed in:

https://chromium-review.googlesource.com/c/chromium/src/+/2459206

Bug: 1134854
Change-Id: I44dc9cf7782f7dbe692d95659e84dd00062df19a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2460248Reviewed-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@{#815360}

ash/shelf/login_shelf_view.cc

@@ -188,10 +188,10 @@ class LoginShelfButton : public views::LabelButton {
     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.