Implement Non-Closable Notification

ui/views/controls/slide_out_view.h

Index: ui/views/controls/slide_out_view.h
diff --git a/ui/views/controls/slide_out_view.h b/ui/views/controls/slide_out_view.h
index 7fdb637cc7b75a9626f8fcd05595901ae1b82a9e..d8d184c9cdbe7b54a8079196e1870353c0d4fd62 100644
--- a/ui/views/controls/slide_out_view.h
+++ b/ui/views/controls/slide_out_view.h
@@ -16,9 +16,13 @@ namespace views {
 class VIEWS_EXPORT SlideOutView : public views::View,
                                   public ui::ImplicitAnimationObserver {
  public:
+  static void DisableAnimationsForTesting();
+
   SlideOutView();
   ~SlideOutView() override;
 
+  bool slide_out_enabled() { return slide_out_enabled_; }
+
  protected:
   // Called when user intends to close the View by sliding it out.
   virtual void OnSlideOut() = 0;
@@ -26,12 +30,18 @@ class VIEWS_EXPORT SlideOutView : public views::View,
   // Overridden from views::View.
   void OnGestureEvent(ui::GestureEvent* event) override;
 
+  void set_slide_out_enabled(bool slide_out_enabled) {
+    slide_out_enabled_ = slide_out_enabled;
+  }
+
  private:
   enum SlideDirection {
     SLIDE_LEFT,
     SLIDE_RIGHT,
   };
 
+  static bool disable_animations_;
+
   // Restores the transform and opacity of the view.
   void RestoreVisualState();
 
@@ -41,7 +51,8 @@ class VIEWS_EXPORT SlideOutView : public views::View,
   // Overridden from ImplicitAnimationObserver.
   void OnImplicitAnimationsCompleted() override;
 
-  float gesture_scroll_amount_;
+  float gesture_amount_ = 0.f;
+  bool slide_out_enabled_ = true;
 
   DISALLOW_COPY_AND_ASSIGN(SlideOutView);
 };