Deflake a test.

I don't think, by contract, page MUST be loaded after
driver.executeScript("window.open(url, 'newWindow')");
driver.switchTo().window("newWindow");
returns. This has been flaky with Chrome on Windows XP, specifically.

java/client/test/org/openqa/selenium/PageLoadingTest.java

@@ -264,6 +264,7 @@ public void testShouldDoNothingIfThereIsNothingToGoBackTo() {
         "window.open('" + pages.formPage + "', 'newWindow')");
     wait.until(newWindowIsOpened(currentWindowHandles));
     driver.switchTo().window("newWindow");
+    wait.until(titleIs("We Leave From Here"));
     String originalTitle = driver.getTitle();
     driver.get(pages.blankPage);
     wait.until(not(titleIs(originalTitle)));