Tightening types for View and VirtualizedList

Reviewed By: yungsters

Differential Revision: D7215391

fbshipit-source-id: fa144c0dc3fd897864403b589e943ea88e78a999

Libraries/Components/View/View.js

@@ -104,4 +104,4 @@ if (__DEV__) {
 }
 
 // No one should depend on the DEV-mode createClass View wrapper.
-module.exports = ((ViewToExport: any): typeof RCTView);
+module.exports = ((ViewToExport: any): typeof View);

Libraries/Lists/VirtualizedList.js

@@ -1175,11 +1175,11 @@ class VirtualizedList extends React.PureComponent<Props, State> {
     );
   }
 
-  _selectLength(metrics: {height: number, width: number}): number {
+  _selectLength(metrics: $ReadOnly<{height: number, width: number}>): number {
     return !this.props.horizontal ? metrics.height : metrics.width;
   }
 
-  _selectOffset(metrics: {x: number, y: number}): number {
+  _selectOffset(metrics: $ReadOnly<{x: number, y: number}>): number {
     return !this.props.horizontal ? metrics.y : metrics.x;
   }