Adds CSS Grid properties to list of unitless numbers (facebook#9185)

Author: ericsakmar

src/renderers/dom/shared/CSSProperty.js

@@ -30,7 +30,13 @@ var isUnitlessNumber = {
   flexNegative: true,
   flexOrder: true,
   gridRow: true,
+  gridRowEnd: true,
+  gridRowSpan: true,
+  gridRowStart: true,
   gridColumn: true,
+  gridColumnEnd: true,
+  gridColumnSpan: true,
+  gridColumnStart: true,
   fontWeight: true,
   lineClamp: true,
   lineHeight: true,

src/renderers/dom/shared/__tests__/CSSProperty-test.js

@@ -25,7 +25,13 @@ describe('CSSProperty', () => {
     expect(CSSProperty.isUnitlessNumber.msFlexGrow).toBeTruthy();
     expect(CSSProperty.isUnitlessNumber.MozFlexGrow).toBeTruthy();
     expect(CSSProperty.isUnitlessNumber.msGridRow).toBeTruthy();
+    expect(CSSProperty.isUnitlessNumber.msGridRowEnd).toBeTruthy();
+    expect(CSSProperty.isUnitlessNumber.msGridRowSpan).toBeTruthy();
+    expect(CSSProperty.isUnitlessNumber.msGridRowStart).toBeTruthy();
     expect(CSSProperty.isUnitlessNumber.msGridColumn).toBeTruthy();
+    expect(CSSProperty.isUnitlessNumber.msGridColumnEnd).toBeTruthy();
+    expect(CSSProperty.isUnitlessNumber.msGridColumnSpan).toBeTruthy();
+    expect(CSSProperty.isUnitlessNumber.msGridColumnStart).toBeTruthy();
   });
 
 });