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..700ed2e9d83e5a9b4ac0b5d5113b6c788113346b 100644
--- a/ash/test/shelf_view_test_api.cc
+++ b/ash/test/shelf_view_test_api.cc
@@ -72,6 +72,11 @@ void ShelfViewTestAPI::ShowOverflowBubble() {
     shelf_view_->ToggleOverflowBubble();
 }
 
+void ShelfViewTestAPI::HideOverflowBubble() {
+  if (shelf_view_->IsShowingOverflowBubble())

[bruthig, 2016/09/01 16:12:54]

Can you make this a DCHECK instead of an if?  It is better to be explicit,
especially in tests.

[mohsen, 2016/09/10 03:03:23]

Done. Also, for the ShowOverflowBubble().

+    shelf_view_->ToggleOverflowBubble();
+}
+
 const gfx::Rect& ShelfViewTestAPI::GetBoundsByIndex(int index) {
   return shelf_view_->view_model_->view_at(index)->bounds();
 }
@@ -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_;
 }