Add MD ink drop ripple to shelf app items

ash/shelf/overflow_button.cc

Index: ash/shelf/overflow_button.cc
diff --git a/ash/shelf/overflow_button.cc b/ash/shelf/overflow_button.cc
index f80c903a845df1f47389774fec603ff4cc652433..6599c844b02d0e1cad88c212226004e8c9dd7fa3 100644
--- a/ash/shelf/overflow_button.cc
+++ b/ash/shelf/overflow_button.cc
@@ -7,6 +7,7 @@
 #include "ash/ash_switches.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
+#include "ash/shelf/shelf_view.h"
 #include "ash/shelf/shelf_widget.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
@@ -35,8 +36,8 @@ const int kBackgroundOffset = (48 - kButtonHoverSize) / 2;
 
 }  // namesapce
 
-OverflowButton::OverflowButton(views::ButtonListener* listener, Shelf* shelf)
-    : CustomButton(listener), bottom_image_(nullptr), shelf_(shelf) {
+OverflowButton::OverflowButton(ShelfView* shelf_view)
+    : CustomButton(nullptr), bottom_image_(nullptr), shelf_view_(shelf_view) {
   ui::ResourceBundle* rb = &ui::ResourceBundle::GetSharedInstance();
   bottom_image_ = rb->GetImageNamed(IDR_ASH_SHELF_OVERFLOW).ToImageSkia();
 
@@ -55,7 +56,7 @@ void OverflowButton::PaintBackground(gfx::Canvas* canvas, int alpha) {
   gfx::Rect rect(0, 0, kButtonHoverSize, kButtonHoverSize);
 
   // Nudge the background a little to line up right.
-  if (shelf_->IsHorizontalAlignment()) {
+  if (shelf_view_->shelf()->IsHorizontalAlignment()) {
     rect.set_origin(gfx::Point(
         bounds.x() + ((bounds.width() - kButtonHoverSize) / 2) - 1,
         bounds.y() + kBackgroundOffset - 1));
@@ -83,16 +84,16 @@ void OverflowButton::OnPaint(gfx::Canvas* canvas) {
   gfx::Rect bounds(GetContentsBounds());
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   int background_image_id = 0;
-  if (shelf_->IsShowingOverflowBubble())
+  if (shelf_view_->shelf()->IsShowingOverflowBubble())
     background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_PRESSED;
-  else if (shelf_->shelf_widget()->GetDimsShelf())
+  else if (shelf_view_->shelf()->shelf_widget()->GetDimsShelf())
     background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_ON_BLACK;
   else
     background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_NORMAL;
 
   const gfx::ImageSkia* background =
       rb.GetImageNamed(background_image_id).ToImageSkia();
-  ShelfAlignment alignment = shelf_->alignment();
+  ShelfAlignment alignment = shelf_view_->shelf()->alignment();
   if (alignment == SHELF_ALIGNMENT_LEFT) {
     bounds = gfx::Rect(
         bounds.right() - background->width() -
@@ -142,4 +143,9 @@ void OverflowButton::OnPaint(gfx::Canvas* canvas) {
                        bounds.y() + ((bounds.height() - image->height()) / 2));
 }
 
+void OverflowButton::NotifyClick(const ui::Event& event) {
+  CustomButton::NotifyClick(event);
+  shelf_view_->ButtonPressed(this, event, ink_drop());
+}
+
 }  // namespace ash