Fixed problem in Text measurent on iOS

Summary: See the comment it code.

Reviewed By: mmmulani

Differential Revision: D7074168

fbshipit-source-id: e6eda9a47552142ccb0ba8e7bd9a103b0cb4f9f9

Author: shergin

Libraries/Text/Text/RCTTextShadowView.m

@@ -355,9 +355,12 @@ static YGSize RCTTextShadowViewMeasure(YGNodeRef node, float width, YGMeasureMod
     MIN(RCTCeilPixelValue(size.height), maximumSize.height)
   };
 
+  // Adding epsilon value illuminates problems with converting values from
+  // `double` to `float`, and then rounding them to pixel grid in Yoga.
+  CGFloat epsilon = 0.001;
   return (YGSize){
-    RCTYogaFloatFromCoreGraphicsFloat(size.width),
-    RCTYogaFloatFromCoreGraphicsFloat(size.height)
+    RCTYogaFloatFromCoreGraphicsFloat(size.width + epsilon),
+    RCTYogaFloatFromCoreGraphicsFloat(size.height + epsilon)
   };
 }