Add gfx::ToRoundedInt safe conversion method from float to int.

ui/gfx/safe_integer_conversions.cc

Index: ui/gfx/safe_integer_conversions.cc
diff --git a/ui/gfx/safe_floor_ceil.cc b/ui/gfx/safe_integer_conversions.cc
similarity index 78%
rename from ui/gfx/safe_floor_ceil.cc
rename to ui/gfx/safe_integer_conversions.cc
index c8ac9e1c9e524e8508fcdb0ac3f0bc4a50e5cd14..cdb69e91adad0cf988abe4dffbfcd583e1695d4a 100644
--- a/ui/gfx/safe_floor_ceil.cc
+++ b/ui/gfx/safe_integer_conversions.cc
@@ -25,5 +25,14 @@ int ToCeiledInt(float value) {
   return ClampToInt(std::ceil(value));
 }
 
+int ToRoundedInt(float value) {

[tfarina, 2012/10/10 00:26:02]

Looks like this is what SymmetricRound() is trying to do.

After you land this, I'll get rid of SymmetricRound() and convert the calls to
gfx::ToRoundedInt().

[danakj, 2012/10/10 00:28:04]

cool :)

+  float rounded;
+  if (value >= 0.0f)
+    rounded = std::floor(value + 0.5f);
+  else
+    rounded = std::ceil(value - 0.5f);
+  return ClampToInt(rounded);
+}
+
 }  // namespace gfx
 

[tfarina, 2012/10/10 00:26:02]

rm extra blank line.

[danakj, 2012/10/10 00:28:04]

Done.