dark mode: Flip base colors for ink drop.

Original thought the dark ripple was for the dark background.

Test: manual
Bug: 1117203
Change-Id: I3221271f8bb1d1d32a8832c75a46c0b8f726426e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363997Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799392}

ash/style/ash_color_provider.cc

@@ -179,7 +179,7 @@ SkColor AshColorProvider::GetContentLayerColor(
 AshColorProvider::RippleAttributes AshColorProvider::GetRippleAttributes(
     SkColor bg_color) const {
   const bool is_dark = color_utils::IsDark(bg_color);
-  const SkColor base_color = is_dark ? SK_ColorBLACK : SK_ColorWHITE;
+  const SkColor base_color = is_dark ? SK_ColorWHITE : SK_ColorBLACK;
   const float opacity =
       is_dark ? kLightInkRippleOpacity : kDarkInkRippleOpacity;
   return RippleAttributes(base_color, opacity, opacity);

ash/system/tray/tray_background_view.cc

@@ -336,7 +336,7 @@ TrayBackgroundView::CreateInkDropHighlight() const {
           ShelfConfig::Get()->GetDefaultShelfColor());
   auto highlight = std::make_unique<views::InkDropHighlight>(
       gfx::SizeF(bounds.size()), ripple_attributes.base_color);
-  highlight->set_visible_opacity(ripple_attributes.inkdrop_opacity);
+  highlight->set_visible_opacity(ripple_attributes.highlight_opacity);
   return highlight;
 }