Define accelerated steps time function.

webkit/renderer/compositor_bindings/web_filter_animation_curve_impl.h

 // Copyright 2013 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 WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_FILTER_ANIMATION_CURVE_IMPL_H_
 #define WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_FILTER_ANIMATION_CURVE_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "third_party/WebKit/public/platform/WebFilterAnimationCurve.h"
 #include "webkit/renderer/compositor_bindings/webkit_compositor_bindings_export.h"
@@ skipping 13 matching lines @@
   WEBKIT_COMPOSITOR_BINDINGS_EXPORT WebFilterAnimationCurveImpl();
   virtual ~WebFilterAnimationCurveImpl();
 
   // blink::WebAnimationCurve implementation.
   virtual AnimationCurveType type() const;
 
   // blink::WebFilterAnimationCurve implementation.
   virtual void add(const blink::WebFilterKeyframe& keyframe,
                    TimingFunctionType type);
   virtual void add(const blink::WebFilterKeyframe& keyframe,
+                   int steps, bool stepsAtStart);

[ajuma, 2014/02/21 19:05:08]

nit: steps_at_start

+  virtual void add(const blink::WebFilterKeyframe& keyframe,
                    double x1,
                    double y1,
                    double x2,
                    double y2);
 
   scoped_ptr<cc::AnimationCurve> CloneToAnimationCurve() const;
 
  private:
   scoped_ptr<cc::KeyframedFilterAnimationCurve> curve_;
 
   DISALLOW_COPY_AND_ASSIGN(WebFilterAnimationCurveImpl);
 };
 
 }  // namespace webkit
 
 #endif  // WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_FILTER_ANIMATION_CURVE_IMPL_H_