Updates from Wed Mar 4

- [react-packager] Start converting options to query params | Amjad Masad
- [ReactNative] Replace js long constants with strings | Tadeu Zagallo
- React Native: Remove Unnecessary `document.body` Shim | Tim Yung
- [ReactNative] Use spread operator and .propTypes for ScrollView/ListView | Christopher Chedeau

Libraries/JavaScriptAppEngine/Initialization/InitializeJavaScriptAppEngine.js

@@ -51,13 +51,10 @@ function setupDocumentShim() {
       throw getInvalidGlobalUseError('Image');
     }
   };
-  if (!GLOBAL.document) {
-    // This shouldn't be needed but scroller library fails without it. If
-    // we fixed the scroller, we wouldn't need this.
-    GLOBAL.document = {body: {}};
-  }
   // Force `ExecutionEnvironment.canUseDOM` to be false.
-  GLOBAL.document.createElement = null;
+  if (GLOBAL.document) {
+    GLOBAL.document.createElement = null;
+  }
 }
 
 function handleErrorWithRedBox(e) {