cc: Delete unused AnimationCurve::AffectsScale and related code

cc/animation/keyframed_animation_curve_unittest.cc

Index: cc/animation/keyframed_animation_curve_unittest.cc
diff --git a/cc/animation/keyframed_animation_curve_unittest.cc b/cc/animation/keyframed_animation_curve_unittest.cc
index 520dad833ea324f6ea22955eee16cff1084fd0d4..e3f765939a763920e84be0e1500252f462782227 100644
--- a/cc/animation/keyframed_animation_curve_unittest.cc
+++ b/cc/animation/keyframed_animation_curve_unittest.cc
@@ -561,37 +561,6 @@ TEST(KeyframedAnimationCurveTest, AnimatedBounds) {
             bounds.ToString());
 }
 
-// Tests that animations that affect scale are correctly identified.
-TEST(KeyframedAnimationCurveTest, AffectsScale) {
-  std::unique_ptr<KeyframedTransformAnimationCurve> curve(
-      KeyframedTransformAnimationCurve::Create());
-
-  TransformOperations operations1;
-  curve->AddKeyframe(
-      TransformKeyframe::Create(base::TimeDelta(), operations1, nullptr));
-  operations1.AppendTranslate(2.0, 3.0, -1.0);
-  TransformOperations operations2;
-  operations2.AppendTranslate(4.0, 1.0, 2.0);
-  curve->AddKeyframe(TransformKeyframe::Create(
-      base::TimeDelta::FromSecondsD(1.f), operations2, nullptr));
-
-  EXPECT_FALSE(curve->AffectsScale());
-
-  TransformOperations operations3;
-  operations3.AppendScale(2.f, 2.f, 2.f);
-  curve->AddKeyframe(TransformKeyframe::Create(
-      base::TimeDelta::FromSecondsD(2.f), operations3, nullptr));
-
-  EXPECT_TRUE(curve->AffectsScale());
-
-  TransformOperations operations4;
-  operations3.AppendTranslate(2.f, 2.f, 2.f);
-  curve->AddKeyframe(TransformKeyframe::Create(
-      base::TimeDelta::FromSecondsD(3.f), operations4, nullptr));
-
-  EXPECT_TRUE(curve->AffectsScale());
-}
-
 // Tests that animations that are translations are correctly identified.
 TEST(KeyframedAnimationCurveTest, IsTranslation) {
   std::unique_ptr<KeyframedTransformAnimationCurve> curve(