Add support for inverse transform animations.

ui/compositor/transform_animation_curve_adapter.h

Index: ui/compositor/transform_animation_curve_adapter.h
diff --git a/ui/compositor/transform_animation_curve_adapter.h b/ui/compositor/transform_animation_curve_adapter.h
index 7b6bdcea52b33fa073faad3f3ddce2f76ab5ffd9..1f88f0e26515cf546999fc3bf8e7207c31945998 100644
--- a/ui/compositor/transform_animation_curve_adapter.h
+++ b/ui/compositor/transform_animation_curve_adapter.h
@@ -36,6 +36,25 @@ class TransformAnimationCurveAdapter :public cc::TransformAnimationCurve {
   base::TimeDelta duration_;
 };
 
+class InverseTransformCurveAdapter :public cc::TransformAnimationCurve {

[Ian Vollick, 2013/08/27 19:54:18]

nit: space after the colon.

[avallee, 2013/08/27 20:19:42]

Done.

+ public:
+  InverseTransformCurveAdapter(TransformAnimationCurveAdapter base_curve,
+                               gfx::Transform initial_value,
+                               base::TimeDelta duration);
+
+  virtual ~InverseTransformCurveAdapter();
+
+  virtual double Duration() const OVERRIDE;
+  virtual scoped_ptr<AnimationCurve> Clone() const OVERRIDE;
+  virtual gfx::Transform GetValue(double t) const OVERRIDE;
+
+ private:
+  TransformAnimationCurveAdapter base_curve_;
+  gfx::Transform initial_value_;
+  gfx::Transform effective_initial_value_;
+  base::TimeDelta duration_;

[Ian Vollick, 2013/08/27 19:54:18]

nit: I know this is missing elsewhere in this file, but shouldn't we be
disallowing copy and assign here? If that works, please update the other class
here, too.

[avallee, 2013/08/27 20:19:42]

Done.

+};
+
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_TRANSFORM_ANIMATION_CURVE_ADAPTER_H_