ARC Toast: Prevent onClosed event from being called multiple times

ash/system/toast/toast_manager_unittest.cc

Index: ash/system/toast/toast_manager_unittest.cc
diff --git a/ash/system/toast/toast_manager_unittest.cc b/ash/system/toast/toast_manager_unittest.cc
index 99d4ad0b2b92e1ac14614216654f5f00d8cf6839..0aa8c6a76ad63381584349c19ecbd2fbaa759cb8 100644
--- a/ash/system/toast/toast_manager_unittest.cc
+++ b/ash/system/toast/toast_manager_unittest.cc
@@ -10,6 +10,8 @@
 #include "ash/system/toast/toast_manager.h"
 #include "ash/test/ash_test_base.h"
 #include "base/run_loop.h"
+#include "ui/compositor/scoped_animation_duration_scale_mode.h"
+#include "ui/compositor/scoped_layer_animation_settings.h"
 
 namespace ash {
 
@@ -35,6 +37,8 @@ class ToastManagerTest : public test::AshTestBase {
 
     manager_->ResetToastIdForTesting();
     EXPECT_EQ(0, GetToastId());
+    test_duration_mode_.reset(new ui::ScopedAnimationDurationScaleMode(
+        ui::ScopedAnimationDurationScaleMode::NON_ZERO_DURATION));
   }
 
  protected:
@@ -78,6 +82,8 @@ class ToastManagerTest : public test::AshTestBase {
  private:
   ToastManager* manager_ = nullptr;
 
+  scoped_ptr<ui::ScopedAnimationDurationScaleMode> test_duration_mode_;
+
   DISALLOW_COPY_AND_ASSIGN(ToastManagerTest);
 };
 
@@ -97,6 +103,26 @@ TEST_F(ToastManagerTest, ShowAndCloseManually) {
 
   EXPECT_EQ(1, GetToastId());
 
+  while (GetCurrentWidget()->GetLayer()->GetAnimator()->is_animating())
+    base::RunLoop().RunUntilIdle();
+
+  ClickDismissButton();
+
+  while (GetCurrentOverlay() != nullptr)
+    base::RunLoop().RunUntilIdle();
+}
+
+TEST_F(ToastManagerTest, ShowAndCloseManuallyDuringAnimation) {
+  ui::ScopedAnimationDurationScaleMode slow_animation_duration(
+      ui::ScopedAnimationDurationScaleMode::SLOW_DURATION);
+
+  manager()->Show("DUMMY", kLongLongDuration /* prevent timeout */);
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_EQ(1, GetToastId());
+  EXPECT_TRUE(GetCurrentWidget()->GetLayer()->GetAnimator()->is_animating());
+
+  // Close it during animation.
   ClickDismissButton();
 
   while (GetCurrentOverlay() != nullptr)