[ash-md] Fixed crash when DEACTIVATING a focused ink drop button.

ui/views/animation/ink_drop_impl_unittest.cc

Index: ui/views/animation/ink_drop_impl_unittest.cc
diff --git a/ui/views/animation/ink_drop_impl_unittest.cc b/ui/views/animation/ink_drop_impl_unittest.cc
index a93fd64b07e43e8cbaa433328bdf860dbcd4734d..e7717daae826aedcfdc03a715e1fe81f961f0073 100644
--- a/ui/views/animation/ink_drop_impl_unittest.cc
+++ b/ui/views/animation/ink_drop_impl_unittest.cc
@@ -478,6 +478,17 @@ TEST_P(InkDropImplHideAutoHighlightTest,
   EXPECT_TRUE(test_api()->ShouldHighlight());
 }
 
+// Verifies there is no crash when animations are started during the destruction
+// of the InkDropRipple. See https://crbug.com/663335.

[tdanderson, 2016/11/08 18:59:14]

Thanks for adding a test

+TEST_P(InkDropImplHideAutoHighlightTest, NoCrashDuringRippleTearDown) {
+  ink_drop()->SetShowHighlightOnFocus(true);
+  ink_drop()->SetFocused(true);
+  ink_drop()->AnimateToState(InkDropState::ACTIVATED);
+  ink_drop()->AnimateToState(InkDropState::DEACTIVATED);
+  ink_drop()->AnimateToState(InkDropState::DEACTIVATED);
+  DestroyInkDrop();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 //
 // InkDropImpl::AutoHighlightMode::SHOW_ON_RIPPLE specific tests