Restore classic ink drop highlights.

This addresses changes in:

https://chromium-review.googlesource.com/c/chromium/src/+/2442354

Note that the restoration is not exact as we are maintaining a fix to
unify launcher inkdrop highlights due to this related bug:

https://bugs.chromium.org/p/chromium/issues/detail?id=1051167

Bug: 1134800
Change-Id: Ie7f70b30bf4ec5fc646cb77e8b18578b96392024
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2464364Reviewed-by: Yulun Wu <yulunwu@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Commit-Queue: Yulun Wu <yulunwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816346}

ash/app_list/app_list_color_provider_impl.cc

@@ -158,24 +158,19 @@ SkColor AppListColorProviderImpl::GetContentsBackgroundColor() const {
 }
 
 SkColor AppListColorProviderImpl::GetSeparatorColor() const {
-  return ash_color_provider_->GetContentLayerColor(
-      AshColorProvider::ContentLayerType::kSeparatorColor);
+  return DeprecatedGetContentLayerColor(
+      AshColorProvider::ContentLayerType::kSeparatorColor,
+      SkColorSetA(gfx::kGoogleGrey900, 0x24));
 }
 
 SkColor AppListColorProviderImpl::GetSearchResultViewInkDropColor() const {
-  AshColorProvider::RippleAttributes ripple_attributes =
-      ash_color_provider_->GetRippleAttributes(
-          GetSearchBoxCardBackgroundColor());
-  return SkColorSetA(ripple_attributes.base_color,
-                     ripple_attributes.inkdrop_opacity * 255);
+  return DeprecatedGetInkDropRippleColor(
+      SkColorSetA(gfx::kGoogleGrey900, 0x14));
 }
 
 SkColor AppListColorProviderImpl::GetSearchResultViewHighlightColor() const {
-  AshColorProvider::RippleAttributes ripple_attributes =
-      ash_color_provider_->GetRippleAttributes(
-          GetSearchBoxCardBackgroundColor());
-  return SkColorSetA(ripple_attributes.base_color,
-                     ripple_attributes.highlight_opacity * 255);
+  return DeprecatedGetInkDropHighlightColor(
+      SkColorSetA(gfx::kGoogleGrey900, 0x12));
 }
 
 float AppListColorProviderImpl::GetFolderBackgrounBlurSigma() const {