src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java

*** 898,909 ****
          long nativePeer = 0L;
          if (platformWindow instanceof CPlatformWindow) {
              nativePeer = ((CPlatformWindow) platformWindow).getContentView().getAWTView();
          } else if (platformWindow instanceof CViewPlatformEmbeddedFrame){
              nativePeer = ((CViewPlatformEmbeddedFrame) platformWindow).getNSViewPtr();
-         } else {
-             throw new IllegalArgumentException("Unsupported platformWindow implementation");
          }
          return nativePeer;
      }
  
      /*************************************************************
--- 898,907 ----