Fixed Back/Forward buttons to not hide ink drop when long press shows drop down menu.

ui/views/controls/button/custom_button.h

 // Copyright (c) 2012 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_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 58 matching lines @@
   // See description above field.
   void set_animate_on_state_change(bool value) {
     animate_on_state_change_ = value;
   }
 
   // Sets the event on which the button should notify its listener.
   void set_notify_action(NotifyAction notify_action) {
     notify_action_ = notify_action;
   }
 
+  void set_hide_ink_drop_when_showing_context_menu(
+      bool hide_ink_drop_when_showing_context_menu) {
+    hide_ink_drop_when_showing_context_menu_ =
+        hide_ink_drop_when_showing_context_menu;
+  }
+
   void set_ink_drop_base_color(SkColor color) { ink_drop_base_color_ = color; }
 
   void SetHotTracked(bool is_hot_tracked);
   bool IsHotTracked() const;
 
   // Overridden from View:
   void OnEnabledChanged() override;
   const char* GetClassName() const override;
   bool OnMousePressed(const ui::MouseEvent& event) override;
   bool OnMouseDragged(const ui::MouseEvent& event) override;
@@ skipping 101 matching lines @@
 
   // True when a button click should trigger an animation action on
   // |ink_drop_delegate_|.
   // TODO(bruthig): Use an InkDropAction enum and drop the flag.
   bool has_ink_drop_action_on_click_;
 
   // The animation action to trigger on the |ink_drop_delegate_| when the button
   // is clicked.
   InkDropState ink_drop_action_on_click_;
 
+  // When true, the ink drop ripple and hover will be hidden prior to showing
+  // the context menu.
+  bool hide_ink_drop_when_showing_context_menu_;
+
   // The color of the ripple and hover.
   SkColor ink_drop_base_color_;
 
   // The MD-style focus ring. This is not done via a FocusPainter
   // because it needs to paint to a layer so it can extend beyond the bounds of
   // |this|.
   views::View* md_focus_ring_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomButton);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_