[Style] added backface-visibility. fixes facebook#1973

Summary:
default behavior remains same(backface visible).

cc @sahrens
Closes facebook#1977
Github Author: chirag04 <[email protected]>

Author: chirag04

Libraries/Components/View/ViewStylePropTypes.js

@@ -21,6 +21,7 @@ var TransformPropTypes = require('TransformPropTypes');
 var ViewStylePropTypes = {
   ...LayoutPropTypes,
   ...TransformPropTypes,
+  backfaceVisibility: ReactPropTypes.oneOf(['visible', 'hidden']),
   backgroundColor: ReactPropTypes.string,
   borderColor: ReactPropTypes.string,
   borderTopColor: ReactPropTypes.string,

React/Base/RCTConvert.h

@@ -120,8 +120,9 @@ typedef NSArray CGColorArray;
 typedef id NSPropertyList;
 + (NSPropertyList)NSPropertyList:(id)json;
 
-typedef BOOL css_clip_t;
+typedef BOOL css_clip_t, css_backface_visibility_t;
 + (css_clip_t)css_clip_t:(id)json;
++ (css_backface_visibility_t)css_backface_visibility_t:(id)json;
 + (css_flex_direction_t)css_flex_direction_t:(id)json;
 + (css_justify_t)css_justify_t:(id)json;
 + (css_align_t)css_align_t:(id)json;

React/Base/RCTConvert.m

@@ -993,6 +993,11 @@ + (NSPropertyList)NSPropertyList:(id)json
   return RCTConvertPropertyListValue(json);
 }
 
+RCT_ENUM_CONVERTER(css_backface_visibility_t, (@{
+  @"hidden": @NO,
+  @"visible": @YES
+}), YES, boolValue)
+
 RCT_ENUM_CONVERTER(css_clip_t, (@{
   @"hidden": @YES,
   @"visible": @NO

React/Views/RCTViewManager.m

@@ -96,6 +96,7 @@ - (RCTViewManagerUIBlock)uiBlockToAmendWithShadowViewRegistry:(__unused RCTSpars
 RCT_EXPORT_VIEW_PROPERTY(backgroundColor, UIColor)
 RCT_REMAP_VIEW_PROPERTY(accessible, isAccessibilityElement, BOOL)
 RCT_REMAP_VIEW_PROPERTY(testID, accessibilityIdentifier, NSString)
+RCT_REMAP_VIEW_PROPERTY(backfaceVisibility, layer.doubleSided, css_backface_visibility_t)
 RCT_REMAP_VIEW_PROPERTY(opacity, alpha, CGFloat)
 RCT_REMAP_VIEW_PROPERTY(shadowColor, layer.shadowColor, CGColor);
 RCT_REMAP_VIEW_PROPERTY(shadowOffset, layer.shadowOffset, CGSize);