[Extensions Toolbar] Fix action pop out bug and views animation

chrome/browser/ui/views/toolbar/browser_actions_container.h

Index: chrome/browser/ui/views/toolbar/browser_actions_container.h
diff --git a/chrome/browser/ui/views/toolbar/browser_actions_container.h b/chrome/browser/ui/views/toolbar/browser_actions_container.h
index 1557376ea99c31020c9a91460bbeefd8096baed2..beaa1ab19ed51ed347853abfbe6cff5505994b0a 100644
--- a/chrome/browser/ui/views/toolbar/browser_actions_container.h
+++ b/chrome/browser/ui/views/toolbar/browser_actions_container.h
@@ -20,7 +20,6 @@
 #include "ui/views/view.h"
 #include "ui/views/widget/widget_observer.h"
 
-class BrowserActionsContainerObserver;
 class ExtensionPopup;
 
 namespace extensions {
@@ -195,10 +194,6 @@ class BrowserActionsContainer
   // the omnibox, this is probably *not* |max_width|).
   int GetWidthForMaxWidth(int max_width) const;
 
-  // Add or remove an observer.
-  void AddObserver(BrowserActionsContainerObserver* observer);
-  void RemoveObserver(BrowserActionsContainerObserver* observer);
-
   // Overridden from views::View:
   gfx::Size GetPreferredSize() const override;
   int GetHeightForWidth(int width) const override;
@@ -355,8 +350,6 @@ class BrowserActionsContainer
   // The extension bubble that is actively showing, if any.
   views::BubbleDelegateView* active_bubble_;
 
-  base::ObserverList<BrowserActionsContainerObserver> observers_;
-
   DISALLOW_COPY_AND_ASSIGN(BrowserActionsContainer);
 };