Tweaks to "Allow InkDropRipple to co-exist with highlight or not exist at all."

ui/views/BUILD.gn

Index: ui/views/BUILD.gn
diff --git a/ui/views/BUILD.gn b/ui/views/BUILD.gn
index eb265087f51750ffed4edb3103dd021472415a2d..7023d17ead3d62d94b8edb578e75efda43ea358b 100644
--- a/ui/views/BUILD.gn
+++ b/ui/views/BUILD.gn
@@ -21,6 +21,8 @@ component("views") {
     "accessible_pane_view.h",
     "animation/bounds_animator.cc",
     "animation/bounds_animator.h",
+    "animation/empty_ink_drop_ripple.cc",
+    "animation/empty_ink_drop_ripple.h",
     "animation/flood_fill_ink_drop_ripple.cc",
     "animation/flood_fill_ink_drop_ripple.h",
     "animation/ink_drop.h",
@@ -633,6 +635,8 @@ component("views") {
 static_library("test_support_internal") {
   testonly = true
   sources = [
+    "animation/test/empty_ink_drop_ripple_test_api.cc",
+    "animation/test/empty_ink_drop_ripple_test_api.h",
     "animation/test/flood_fill_ink_drop_ripple_test_api.cc",
     "animation/test/flood_fill_ink_drop_ripple_test_api.h",
     "animation/test/ink_drop_highlight_test_api.cc",