Added pretty printers for some Ink Drop enums.

ui/views/animation/ink_drop_hover.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_ANIMATION_INK_DROP_HOVER_H_
 #define UI_VIEWS_ANIMATION_INK_DROP_HOVER_H_
 
+#include <iosfwd>
 #include <memory>
 
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/point_f.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/transform.h"
 #include "ui/views/views_export.h"
@@ skipping 88 matching lines @@
   std::unique_ptr<RoundedRectangleLayerDelegate> layer_delegate_;
 
   // The visual hover layer that is painted by |layer_delegate_|.
   std::unique_ptr<ui::Layer> layer_;
 
   InkDropHoverObserver* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(InkDropHover);
 };
 
+// Returns a human readable string for |animation_type|.  Useful for logging.
+VIEWS_EXPORT std::string ToString(
+    const InkDropHover::AnimationType& animation_type);

[sky, 2016/05/04 23:43:42]

Same comment here.

[bruthig, 2016/05/04 23:51:48]

Done.

+
+// This is declared here for use in gtest-based unit tests but is defined in
+// the views_test_support target. Depend on that to use this in your unit test.
+// This should not be used in production code - call ToString() instead.
+void PrintTo(const InkDropHover::AnimationType& animation_type,

[sky, 2016/05/04 23:43:42]

and here.

[bruthig, 2016/05/04 23:51:48]

Done.

+             ::std::ostream* os);
+
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_HOVER_H_