Add ink drop ripple to shelf overflow button

ash/common/shelf/overflow_bubble.cc

Index: ash/common/shelf/overflow_bubble.cc
diff --git a/ash/common/shelf/overflow_bubble.cc b/ash/common/shelf/overflow_bubble.cc
index eadd54e5597a976ef9ffd9c0e75b93b8b63d770e..c8828569e41364d7990c6840e743eca3baeb4c97 100644
--- a/ash/common/shelf/overflow_bubble.cc
+++ b/ash/common/shelf/overflow_bubble.cc
@@ -5,6 +5,7 @@
 #include "ash/common/shelf/overflow_bubble.h"
 
 #include "ash/common/shelf/overflow_bubble_view.h"
+#include "ash/common/shelf/overflow_button.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/system/tray/tray_background_view.h"
 #include "ash/common/wm_shell.h"
@@ -17,7 +18,7 @@ namespace ash {
 OverflowBubble::OverflowBubble(WmShelf* wm_shelf)
     : wm_shelf_(wm_shelf),
       bubble_(nullptr),
-      anchor_(nullptr),
+      button_(nullptr),
       shelf_view_(nullptr) {
   WmShell::Get()->AddPointerDownWatcher(this);
 }
@@ -27,47 +28,42 @@ OverflowBubble::~OverflowBubble() {
   WmShell::Get()->RemovePointerDownWatcher(this);
 }
 
-void OverflowBubble::Show(views::View* anchor, ShelfView* shelf_view) {
+void OverflowBubble::Show(OverflowButton* button, ShelfView* shelf_view) {
   Hide();
 
   bubble_ = new OverflowBubbleView(wm_shelf_);
-  bubble_->InitOverflowBubble(anchor, shelf_view);
+  bubble_->InitOverflowBubble(button, shelf_view);
   shelf_view_ = shelf_view;
-  anchor_ = anchor;
+  button_ = button;
 
   TrayBackgroundView::InitializeBubbleAnimations(bubble_->GetWidget());
   bubble_->GetWidget()->AddObserver(this);
   bubble_->GetWidget()->Show();
+
+  button->OnOverflowBubbleShown();
 }
 
 void OverflowBubble::Hide() {
   if (!IsShowing())
     return;
 
+  OverflowButton* button = button_;
+
   bubble_->GetWidget()->RemoveObserver(this);
   bubble_->GetWidget()->Close();
-  bubble_ = NULL;
-  anchor_ = NULL;
-  shelf_view_ = NULL;
-}
+  bubble_ = nullptr;
+  button_ = nullptr;
+  shelf_view_ = nullptr;
 
-void OverflowBubble::HideBubbleAndRefreshButton() {
-  if (!IsShowing())
-    return;
-
-  views::View* anchor = anchor_;
-  Hide();
-  // Update overflow button (|anchor|) status when overflow bubble is hidden
-  // by outside event of overflow button.
-  anchor->SchedulePaint();
+  button->OnOverflowBubbleHidden();
 }
 
 void OverflowBubble::ProcessPressedEvent(
     const gfx::Point& event_location_in_screen) {
   if (IsShowing() && !shelf_view_->IsShowingMenu() &&
       !bubble_->GetBoundsInScreen().Contains(event_location_in_screen) &&
-      !anchor_->GetBoundsInScreen().Contains(event_location_in_screen)) {
-    HideBubbleAndRefreshButton();
+      !button_->GetBoundsInScreen().Contains(event_location_in_screen)) {
+    Hide();
   }
 }
 
@@ -85,10 +81,10 @@ void OverflowBubble::OnTouchPressed(const ui::TouchEvent& event,
 
 void OverflowBubble::OnWidgetDestroying(views::Widget* widget) {
   DCHECK(widget == bubble_->GetWidget());
-  bubble_ = NULL;
-  anchor_ = NULL;
+  bubble_ = nullptr;
+  button_ = nullptr;
   wm_shelf_->SchedulePaint();
-  shelf_view_ = NULL;
+  shelf_view_ = nullptr;
 }
 
 }  // namespace ash