Only look at computed style if key was not set inline

Summary: Prefer inline style to computed style as inline style should be the source of truth and computed style may differ

Reviewed By: gkassabli

Differential Revision: D4029373

fbshipit-source-id: 39ce9d577f295c2361dc384212d7467418c63c33

gentest/gentest.js

@@ -479,7 +479,7 @@ function getCSSLayoutStyle(node) {
     'min-height',
     'max-height',
   ].reduce(function(map, key) {
-    map[key] = getComputedStyle(node, null).getPropertyValue(key);
+    map[key] = node.style[key] || getComputedStyle(node, null).getPropertyValue(key);
     return map;
   }, {});
 }