Fix for bug where composited rotate3d should SLERP

cc/animation/transform_operation.cc

Index: cc/animation/transform_operation.cc
diff --git a/cc/animation/transform_operation.cc b/cc/animation/transform_operation.cc
index 7421924aedcea56ef9658d47bc2e4c77225404d2..e487921cdb4ba3aa85a0a1054b58811f552c793d 100644
--- a/cc/animation/transform_operation.cc
+++ b/cc/animation/transform_operation.cc
@@ -41,7 +41,7 @@ static bool ShareSameAxis(const TransformOperation* from,
   if (IsOperationIdentity(from) && IsOperationIdentity(to))
     return false;
 
-  if (IsOperationIdentity(from) && !IsOperationIdentity(to)) {
+  if (!from && !IsOperationIdentity(to)) {
     *axis_x = to->rotate.axis.x;
     *axis_y = to->rotate.axis.y;
     *axis_z = to->rotate.axis.z;
@@ -49,7 +49,7 @@ static bool ShareSameAxis(const TransformOperation* from,
     return true;
   }
 
-  if (!IsOperationIdentity(from) && IsOperationIdentity(to)) {
+  if (!IsOperationIdentity(from) && !to) {
     *axis_x = from->rotate.axis.x;
     *axis_y = from->rotate.axis.y;
     *axis_z = from->rotate.axis.z;