Fixes ink drop being "stuck" on when losing focus.

ui/views/animation/test/test_ink_drop_delegate.cc

Index: ui/views/animation/test/test_ink_drop_delegate.cc
diff --git a/ui/views/animation/test/test_ink_drop_delegate.cc b/ui/views/animation/test/test_ink_drop_delegate.cc
index 9d20cf0fffc09e5f7b6a6cacb83efcdc4e1b4330..9ab4c7c6c771e57ced68920377cd4e68f3f5e9ac 100644
--- a/ui/views/animation/test/test_ink_drop_delegate.cc
+++ b/ui/views/animation/test/test_ink_drop_delegate.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "ui/views/animation/test/test_ink_drop.h"
 #include "ui/views/animation/test/test_ink_drop_delegate.h"
 
 namespace views {
@@ -29,7 +30,9 @@ InkDropState TestInkDropDelegate::GetTargetInkDropState() const {
 }
 
 InkDrop* TestInkDropDelegate::GetInkDrop() {
-  return nullptr;
+  if (!ink_drop_.get())
+    ink_drop_ = base::WrapUnique(new TestInkDrop());

[sky, 2016/06/02 02:01:40]

nit: ink_drop.reset(new TestInkDrop); is shorter and more concise.

Also, I'm not sure if this should be added. Wait for Ben to review this.

+  return ink_drop_.get();
 }
 
 }  // namespace test