  Universality in anomaly flow by an Aharonov-Bohm (AB) phase $\theta_H$ is
shown in the flat $M^4 \times (S^1/Z_2)$ spacetime and in the Randall-Sundrum
(RS) warped space. We analyze $SU(2)$ gauge theory with doublet fermions. With
orbifold boundary conditions the $U(1)$ part of gauge symmetry remains unbroken
at $\theta_H = 0$ and $\pi$. Chiral anomalies smoothly vary with $\theta_H$ in
the RS space. It is shown that anomaly coefficients associated with this
anomaly flow are expressed in terms of the values of the wave functions of
gauge fields at the UV and IR branes in the RS space. The anomaly coefficients
depend on $\theta_H$, the warp factor of the RS space, and the orbifold
boundary conditions for fermions, but not on the bulk mass parameters of
fermions.
