Enable accelerated animations for orphaned layers

cc/test/animation_test_common.cc

Index: cc/test/animation_test_common.cc
diff --git a/cc/test/animation_test_common.cc b/cc/test/animation_test_common.cc
index 6b896b6644820544a143a1a4008965970455d87b..9f4a61fe894e290c0d83089401be7f56f6d6ef4a 100644
--- a/cc/test/animation_test_common.cc
+++ b/cc/test/animation_test_common.cc
@@ -170,6 +170,11 @@ bool FakeLayerAnimationValueObserver::IsActive() const
     return true;
 }
 
+bool FakeLayerAnimationValueObserver::IsOrphaned() const
+{
+    return false;
+}
+
 scoped_ptr<cc::AnimationCurve> FakeFloatTransition::clone() const
 {
     return make_scoped_ptr(new FakeFloatTransition(*this)).PassAs<cc::AnimationCurve>();