Added pretty printers for some Ink Drop enums.

ui/views/animation/ink_drop_hover.cc

 // 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.
 
 #include "ui/views/animation/ink_drop_hover.h"
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/compositor/callback_layer_animation_observer.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_sequence.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/views/animation/ink_drop_hover_observer.h"
 #include "ui/views/animation/ink_drop_painted_layer_delegates.h"
 
 namespace views {
 
 namespace {
 
 // The opacity of the hover when it is visible.
 const float kHoverVisibleOpacity = 0.128f;
 
 // The opacity of the hover when it is not visible.
 const float kHiddenOpacity = 0.0f;
 
 }  // namespace
 
+std::string ToString(InkDropHover::AnimationType animation_type) {
+  switch (animation_type) {
+    case InkDropHover::FADE_IN:
+      return std::string("FADE_IN");
+    case InkDropHover::FADE_OUT:
+      return std::string("FADE_OUT");
+  }
+  NOTREACHED()
+      << "Should never be reached but is necessary for some compilers.";
+  return std::string("UNKNOWN");
+}
+
 InkDropHover::InkDropHover(const gfx::Size& size,
                            int corner_radius,
                            const gfx::Point& center_point,
                            SkColor color)
     : size_(size),
       explode_size_(size),
       center_point_(center_point),
       last_animation_initiated_was_fade_in_(false),
       layer_delegate_(
           new RoundedRectangleLayerDelegate(color, size, corner_radius)),
@@ skipping 100 matching lines @@
   if (observer_) {
     observer_->AnimationEnded(animation_type,
                               observer.aborted_count()
                                   ? InkDropAnimationEndedReason::PRE_EMPTED
                                   : InkDropAnimationEndedReason::SUCCESS);
   }
   return true;
 }
 
 }  // namespace views