Add -webkit-overflow-scrolling : touch

[yisibl]

input:

.foo {
  overflow : auto; /* or overflow-x/y: scroll */
}

output:

.foo {
  overflow : auto;  /* or overflow-x/y: scroll */
  -webkit-overflow-scrolling: touch;
}

Demo: http://codepen.io/yisi/pen/EaMpVV