[ash-md] Remove the number of animators used for the Shelf animations.

ui/gfx/animation/slide_animation.h

 // Copyright (c) 2012 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_GFX_ANIMATION_SLIDE_ANIMATION_H_
 #define UI_GFX_ANIMATION_SLIDE_ANIMATION_H_
 
 #include "base/macros.h"
 #include "ui/gfx/animation/linear_animation.h"
 #include "ui/gfx/animation/tween.h"
@@ skipping 39 matching lines @@
   explicit SlideAnimation(AnimationDelegate* target);
   ~SlideAnimation() override;
 
   // Set the animation back to the 0 state.
   virtual void Reset();
   virtual void Reset(double value);
 
   // Begin a showing animation or reverse a hiding animation in progress.
   virtual void Show();
 
+  // Synchronously completes the show animation.
+  void ShowImmediately();

[sky, 2017/02/08 03:02:56]

Can you motivate why you want these? I would prefer client code deal with this
situation rather than complicating the animation code. By that I mean if the
client code knows to call this, then presumably the client can take whatever
action completely immediately would.

[bruthig, 2017/02/10 18:49:10]

Done.

+
   // Begin a hiding animation or reverse a showing animation in progress.
   virtual void Hide();
 
+  // Synchronously completes the hide animation.
+  void HideImmediately();
+
   // Sets the time a slide will take. Note that this isn't actually
   // the amount of time an animation will take as the current value of
   // the slide is considered.
   virtual void SetSlideDuration(int duration);
   int GetSlideDuration() const { return slide_duration_; }
   void SetTweenType(Tween::Type tween_type) { tween_type_ = tween_type; }
 
   double GetCurrentValue() const override;
+  // TODO(bruthig): Fix IsShowing() and IsClosing() to be consistent. e.g.
+  // IsShowing() will currently return true after the 'show' animation has been
+  // completed however IsClosing() will return false after the 'hide' animation
+  // has been completed.
   bool IsShowing() const { return showing_; }
   bool IsClosing() const { return !showing_ && value_end_ < value_current_; }
 
   class TestApi;
 
  private:
   // Overridden from Animation.
   void AnimateToState(double state) override;
 
   AnimationDelegate* target_;
@@ skipping 12 matching lines @@
   // How long a hover in/out animation will last for. This defaults to
   // kHoverFadeDurationMS, but can be overridden with SetDuration.
   int slide_duration_;
 
   DISALLOW_COPY_AND_ASSIGN(SlideAnimation);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_ANIMATION_SLIDE_ANIMATION_H_