Allow aspect ratio to expand beyond bounds of parent

Reviewed By: passy

Differential Revision: D4397547

fbshipit-source-id: d2b1ca7b096f2f17b3efbd8f47a50678bfe7bb5f

ReactCommon/yoga/yoga/Yoga.c

@@ -2239,8 +2239,11 @@ static void YGNodelayoutImpl(const YGNodeRef node,
                                                               availableInnerWidth));
             childHeightMeasureMode = YGMeasureModeExactly;
 
+            // Parent size constraint should have higher priority than flex
+            if (YGNodeIsFlex(currentRelativeChild)) {
               childHeight = fminf(childHeight, availableInnerHeight);
               childWidth = childHeight * currentRelativeChild->style.aspectRatio;
+            }
           } else {
             childWidth = fmaxf(childHeight * currentRelativeChild->style.aspectRatio,
                                YGNodePaddingAndBorderForAxis(currentRelativeChild,
@@ -2248,10 +2251,13 @@ static void YGNodelayoutImpl(const YGNodeRef node,
                                                              availableInnerWidth));
             childWidthMeasureMode = YGMeasureModeExactly;
 
+            // Parent size constraint should have higher priority than flex
+            if (YGNodeIsFlex(currentRelativeChild)) {
               childWidth = fminf(childWidth, availableInnerWidth);
               childHeight = childWidth / currentRelativeChild->style.aspectRatio;
             }
           }
+        }
 
         YGConstrainMaxSizeForMode(
             YGValueResolve(&currentRelativeChild->style.maxDimensions[YGDimensionWidth],