[Mac Extensions Toolbar] Make the container's animationEndFrame always valid

chrome/browser/ui/toolbar/toolbar_actions_bar.h

Index: chrome/browser/ui/toolbar/toolbar_actions_bar.h
diff --git a/chrome/browser/ui/toolbar/toolbar_actions_bar.h b/chrome/browser/ui/toolbar/toolbar_actions_bar.h
index 9f9d5e91f046ff63e9147f63381fdaefbceab53f..b65f7b223530ead86ea1eb2516570e228df2e30a 100644
--- a/chrome/browser/ui/toolbar/toolbar_actions_bar.h
+++ b/chrome/browser/ui/toolbar/toolbar_actions_bar.h
@@ -119,7 +119,9 @@ class ToolbarActionsBar : public extensions::ExtensionToolbarModel::Observer,
   }
   bool enabled() const { return model_ != nullptr; }
   bool suppress_layout() const { return suppress_layout_; }
-  bool suppress_animation() const { return suppress_animation_; }
+  bool suppress_animation() const {
+    return suppress_animation_ || disable_animations_for_testing_;
+  }
   bool is_highlighting() const { return model_ && model_->is_highlighting(); }
   const PlatformSettings& platform_settings() const {
     return platform_settings_;
@@ -127,6 +129,11 @@ class ToolbarActionsBar : public extensions::ExtensionToolbarModel::Observer,
 
   ToolbarActionsBarDelegate* delegate_for_test() { return delegate_; }
 
+  // During testing we can disable animations by setting this flag to true,
+  // so that the bar resizes instantly, instead of having to poll it while it
+  // animates to open/closed status.
+  static bool disable_animations_for_testing_;
+
  private:
   using ToolbarActions = ScopedVector<ToolbarActionViewController>;