Add ink drop ripple to shelf overflow button

ash/test/shelf_view_test_api.cc

Index: ash/test/shelf_view_test_api.cc
diff --git a/ash/test/shelf_view_test_api.cc b/ash/test/shelf_view_test_api.cc
index a14432c1f958ecc65d3c30f7f3d96a4e4cb8a0ab..5c5c98d6592ad9ad63fedd6b4482435f044325a0 100644
--- a/ash/test/shelf_view_test_api.cc
+++ b/ash/test/shelf_view_test_api.cc
@@ -68,8 +68,13 @@ bool ShelfViewTestAPI::IsOverflowButtonVisible() {
 }
 
 void ShelfViewTestAPI::ShowOverflowBubble() {
-  if (!shelf_view_->IsShowingOverflowBubble())
-    shelf_view_->ToggleOverflowBubble();
+  DCHECK(!shelf_view_->IsShowingOverflowBubble());
+  shelf_view_->ToggleOverflowBubble();
+}
+
+void ShelfViewTestAPI::HideOverflowBubble() {
+  DCHECK(shelf_view_->IsShowingOverflowBubble());
+  shelf_view_->ToggleOverflowBubble();
 }
 
 const gfx::Rect& ShelfViewTestAPI::GetBoundsByIndex(int index) {
@@ -110,6 +115,10 @@ OverflowBubble* ShelfViewTestAPI::overflow_bubble() {
   return shelf_view_->overflow_bubble_.get();
 }
 
+OverflowButton* ShelfViewTestAPI::overflow_button() const {
+  return shelf_view_->overflow_button_;
+}
+
 ShelfTooltipManager* ShelfViewTestAPI::tooltip_manager() {
   return &shelf_view_->tooltip_;
 }