Revert of [Extensions] Don't count bubble dismissal from focus loss as acknowledgment

ui/views/bubble/bubble_delegate.h

Index: ui/views/bubble/bubble_delegate.h
diff --git a/ui/views/bubble/bubble_delegate.h b/ui/views/bubble/bubble_delegate.h
index 1bd963405810e9e01b9891e584f1d940954628af..3bc73f8c729d0983f07d044dc78186e48cc472c5 100644
--- a/ui/views/bubble/bubble_delegate.h
+++ b/ui/views/bubble/bubble_delegate.h
@@ -28,13 +28,6 @@
   // Internal class name.
   static const char kViewClassName[];
 
-  enum class CloseReason {
-    DEACTIVATION,
-    ESCAPE,
-    CLOSE_BUTTON,
-    UNKNOWN,
-  };
-
   BubbleDelegateView();
   BubbleDelegateView(View* anchor_view, BubbleBorder::Arrow arrow);
   ~BubbleDelegateView() override;
@@ -51,7 +44,6 @@
   const char* GetClassName() const override;
 
   // WidgetObserver overrides:
-  void OnWidgetClosing(Widget* widget) override;
   void OnWidgetDestroying(Widget* widget) override;
   void OnWidgetVisibilityChanging(Widget* widget, bool visible) override;
   void OnWidgetVisibilityChanged(Widget* widget, bool visible) override;
@@ -101,8 +93,6 @@
   bool adjust_if_offscreen() const { return adjust_if_offscreen_; }
   void set_adjust_if_offscreen(bool adjust) { adjust_if_offscreen_ = adjust; }
 
-  CloseReason close_reason() const { return close_reason_; }
-
   // Get the arrow's anchor rect in screen space.
   virtual gfx::Rect GetAnchorRect() const;
 
@@ -202,8 +192,6 @@
   // Parent native window of the bubble.
   gfx::NativeView parent_window_;
 
-  CloseReason close_reason_;
-
   DISALLOW_COPY_AND_ASSIGN(BubbleDelegateView);
 };