[Reland][Extensions] Don't count bubble 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 3bc73f8c729d0983f07d044dc78186e48cc472c5..1bd963405810e9e01b9891e584f1d940954628af 100644
--- a/ui/views/bubble/bubble_delegate.h
+++ b/ui/views/bubble/bubble_delegate.h
@@ -28,6 +28,13 @@ class VIEWS_EXPORT BubbleDelegateView : public WidgetDelegateView,
   // 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;
@@ -44,6 +51,7 @@ class VIEWS_EXPORT BubbleDelegateView : public WidgetDelegateView,
   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;
@@ -93,6 +101,8 @@ class VIEWS_EXPORT BubbleDelegateView : public WidgetDelegateView,
   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;
 
@@ -192,6 +202,8 @@ class VIEWS_EXPORT BubbleDelegateView : public WidgetDelegateView,
   // Parent native window of the bubble.
   gfx::NativeView parent_window_;
 
+  CloseReason close_reason_;
+
   DISALLOW_COPY_AND_ASSIGN(BubbleDelegateView);
 };