/** Posts url on the UI thread and blocks until onPageFinished is called. */
protected void postUrlSync(
final AwContents awContents,
CallbackHelper onPageFinishedHelper,
final String url,
byte[] postData)
throws Throwable {
int currentCallCount = onPageFinishedHelper.getCallCount();
postUrlAsync(awContents, url, postData);
onPageFinishedHelper.waitForCallback(
currentCallCount, 1, WAIT_TIMEOUT_SECONDS, TimeUnit.SECONDS);
}
