WIP - allow vector icons to specify motion.

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

Index: chrome/browser/ui/views/toolbar/app_menu_button.h
diff --git a/chrome/browser/ui/views/toolbar/app_menu_button.h b/chrome/browser/ui/views/toolbar/app_menu_button.h
index 96290b40b659500fc84272b286ff4ab28b5704b1..5e21d39cae73f730c0b55cdb4525118b08506d25 100644
--- a/chrome/browser/ui/views/toolbar/app_menu_button.h
+++ b/chrome/browser/ui/views/toolbar/app_menu_button.h
@@ -9,6 +9,8 @@
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "base/time/time.h"
+#include "base/timer/timer.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/ui/toolbar/app_menu_icon_controller.h"
 #include "ui/views/controls/button/menu_button.h"
@@ -25,6 +27,7 @@ class MenuListener;
 
 class AppMenuAnimation;
 class ToolbarView;
+class VectorIconAnimator;
 
 class AppMenuButton : public views::MenuButton, public TabStripModelObserver {
  public:
@@ -117,7 +120,7 @@ class AppMenuButton : public views::MenuButton, public TabStripModelObserver {
   std::unique_ptr<AppMenu> menu_;
 
   // Used for animating and drawing the app menu icon.
-  std::unique_ptr<AppMenuAnimation> animation_;
+  std::unique_ptr<VectorIconAnimator> animator_;
 
   // True if the app menu should use the new animated icon.
   bool should_use_new_icon_;
@@ -126,6 +129,9 @@ class AppMenuButton : public views::MenuButton, public TabStripModelObserver {
   // a maximized state to extend to the full window width.
   int margin_trailing_;
 
+  base::TimeTicks animation_start_time_;
+  base::RepeatingTimer animation_timer_;
+
   // Used to spawn weak pointers for delayed tasks to open the overflow menu.
   base::WeakPtrFactory<AppMenuButton> weak_factory_;