Use ink drop hover for focus states on toolbar buttons and location

ui/views/animation/ink_drop_host_view.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_ANIMATION_INK_DROP_HOST_VIEW_H_
 #define UI_VIEWS_ANIMATION_INK_DROP_HOST_VIEW_H_
 
 #include <memory>
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/geometry/size.h"
+#include "ui/views/animation/ink_drop_delegate.h"
 #include "ui/views/animation/ink_drop_host.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 class InkDropRipple;
 class InkDropHover;
 
 // A view that provides InkDropHost functionality.
-class VIEWS_EXPORT InkDropHostView : public views::View, public InkDropHost {
+class VIEWS_EXPORT InkDropHostView : public View, public InkDropHost {
  public:
-  InkDropHostView();
-  ~InkDropHostView() override;
-
   // Overridden from views::InkDropHost:
   void AddInkDropLayer(ui::Layer* ink_drop_layer) override;
   void RemoveInkDropLayer(ui::Layer* ink_drop_layer) override;
   std::unique_ptr<InkDropRipple> CreateInkDropRipple() const override;
   std::unique_ptr<InkDropHover> CreateInkDropHover() const override;
 
   void set_ink_drop_size(const gfx::Size& size) { ink_drop_size_ = size; }
 
+  InkDropDelegate* ink_drop_delegate() { return ink_drop_delegate_.get(); }
+
  protected:
+  InkDropHostView();
+  ~InkDropHostView() override;
+
   static const int kInkDropSmallCornerRadius;
 
+  // View
+  void OnFocus() override;
+  void OnBlur() override;
+
   // Overrideable methods to allow views to provide minor tweaks to the default
   // ink drop.
   virtual gfx::Point GetInkDropCenter() const;
   virtual SkColor GetInkDropBaseColor() const;
 
+  // Should return true if the ink drop is also used to depict focus.
+  virtual bool ShouldShowInkDropForFocus() const;
+
+  void set_ink_drop_delegate(std::unique_ptr<InkDropDelegate> delegate) {
+    ink_drop_delegate_ = std::move(delegate);
+  }
+
  private:
+  std::unique_ptr<InkDropDelegate> ink_drop_delegate_;
   gfx::Size ink_drop_size_;
+  bool destroying_;
 
   DISALLOW_COPY_AND_ASSIGN(InkDropHostView);
 };
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_HOST_VIEW_H_