[Extension Toolbar] Slide out overflowed actions for popups

chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h

Index: chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h
diff --git a/chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h b/chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h
index f748c17c6b1efcae04d0e37b4d75ecde4d570b23..a5f36dd0ff9735c7fbe9f54df5a0693f98bbedc3 100644
--- a/chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h
+++ b/chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h
@@ -26,9 +26,14 @@ extern NSString* const kBrowserActionsContainerWillAnimate;
 // enabled).
 extern NSString* const kBrowserActionsContainerMouseEntered;
 
+// Sent when a running animation has ended.
+extern NSString* const kBrowserActionsContainerAnimationEnded;
+
 // Key which is used to notify the translation with delta.
 extern NSString* const kTranslationWithDelta;
 
+@class ContainerAnimationHelper;
+
 class BrowserActionsContainerViewSizeDelegate {
  public:
   virtual CGFloat GetMaxAllowedWidth() = 0;
@@ -85,6 +90,7 @@ class BrowserActionsContainerViewSizeDelegate {
   BrowserActionsContainerViewSizeDelegate* sizeDelegate_;
 
   base::scoped_nsobject<NSViewAnimation> resizeAnimation_;
+  base::scoped_nsobject<ContainerAnimationHelper> animationHelper_;
 }
 
 // Sets whether or not tracking (for mouseEntered events) is enabled.