Post a Runnable to execute setNewZoomScale when

WebView's onSizeChanged is called. This will ensure
requestLayout of the Child View works.

Fix http://b/issue?id=2323445

core/java/android/webkit/WebView.java

@@ -3798,10 +3798,18 @@ public class WebView extends AbsoluteLayout
             }
         }
 
-        // we always force, in case our height changed, in which case we still
-        // want to send the notification over to webkit
+        // onSizeChanged() is called during WebView layout. And any
+        // requestLayout() is blocked during layout. As setNewZoomScale() will
+        // call its child View to reposition itself through ViewManager's
+        // scaleAll(), we need to post a Runnable to ensure requestLayout().
+        post(new Runnable() {
+            public void run() {
+                // we always force, in case our height changed, in which case we
+                // still want to send the notification over to webkit
                 setNewZoomScale(mActualScale, true);
             }
+        });
+    }
 
     @Override
     protected void onScrollChanged(int l, int t, int oldl, int oldt) {