Relax the eplison to check snapping

ui/compositor/dip_util.cc

Index: ui/compositor/dip_util.cc
diff --git a/ui/compositor/dip_util.cc b/ui/compositor/dip_util.cc
index f7290e05c496ca5a3752f94df6eb27a797cb4609..900ce710c6ebfdb1b974ba358818bbb0baf45656 100644
--- a/ui/compositor/dip_util.cc
+++ b/ui/compositor/dip_util.cc
@@ -66,7 +66,7 @@ gfx::Rect ConvertRectToPixel(const Layer* layer,
 namespace {
 
 void CheckSnapped(float snapped_position) {
-  const float kEplison = 0.0001f;
+  const float kEplison = 0.0002f;

[servolk, 2017/03/23 21:49:00]

Nit: fix the typo while you are at it kEplison -> kEpsilon

[servolk, 2017/03/23 21:50:23]

Also, I'm pretty sure 0.0002f is not enough. I have been still getting DCHECKs
when I tried that locally. 0.0005f seems to work fine. But it's still not clear
to me how this value was calculated. Do you mind explaining why you chose
0.0002f?

   float diff = std::abs(snapped_position - gfx::ToRoundedInt(snapped_position));
   DCHECK_LT(diff, kEplison);
 }