Use an epsilon value 0.001f for the rectilinear calculation.

Use an epsilon value 0.001f for the rectilinear calculation.

[Title] Use an epsilon value 0.001f for the rectilinear calculation.
[Issue#] P130910-04255
[Problem] Flickering occurs when the menu appears with animation on the Docomo PhotoCollection website.
[Cause] The results of whether a quad can be losslessly represented by a FloatRect are inconsistent during CSS animation.
Because the value of epsilon is set too high.
[Solution] Set the epsilon value to 0.001f for rectilinear clips.

Change-Id: Ibadf414b882035d1698bbc41b6088b6c54d63869