Remove parts of //cc we aren't using

cc/animation/animation_curve.cc

-// Copyright 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.
-
-#include "cc/animation/animation_curve.h"
-
-#include "base/logging.h"
-#include "cc/animation/scroll_offset_animation_curve.h"
-
-namespace cc {
-
-const ColorAnimationCurve* AnimationCurve::ToColorAnimationCurve() const {
-  DCHECK(Type() == AnimationCurve::COLOR);
-  return static_cast<const ColorAnimationCurve*>(this);
-}
-
-AnimationCurve::CurveType ColorAnimationCurve::Type() const {
-  return COLOR;
-}
-
-const FloatAnimationCurve* AnimationCurve::ToFloatAnimationCurve() const {
-  DCHECK(Type() == AnimationCurve::FLOAT);
-  return static_cast<const FloatAnimationCurve*>(this);
-}
-
-AnimationCurve::CurveType FloatAnimationCurve::Type() const {
-  return FLOAT;
-}
-
-const TransformAnimationCurve* AnimationCurve::ToTransformAnimationCurve()
-    const {
-  DCHECK(Type() == AnimationCurve::TRANSFORM);
-  return static_cast<const TransformAnimationCurve*>(this);
-}
-
-AnimationCurve::CurveType TransformAnimationCurve::Type() const {
-  return TRANSFORM;
-}
-
-const FilterAnimationCurve* AnimationCurve::ToFilterAnimationCurve() const {
-  DCHECK(Type() == AnimationCurve::FILTER);
-  return static_cast<const FilterAnimationCurve*>(this);
-}
-
-AnimationCurve::CurveType FilterAnimationCurve::Type() const {
-  return FILTER;
-}
-
-const ScrollOffsetAnimationCurve* AnimationCurve::ToScrollOffsetAnimationCurve()
-    const {
-  DCHECK(Type() == AnimationCurve::SCROLL_OFFSET);
-  return static_cast<const ScrollOffsetAnimationCurve*>(this);
-}
-
-ScrollOffsetAnimationCurve* AnimationCurve::ToScrollOffsetAnimationCurve() {
-  DCHECK(Type() == AnimationCurve::SCROLL_OFFSET);
-  return static_cast<ScrollOffsetAnimationCurve*>(this);
-}
-
-}  // namespace cc