More tests for UrlUtilities#isValidForIntentFallbackNavigation.

I stumbled on isValidForIntentFallbackNavigation and found that having this
more verbose tests would make it easier for me to understand what I can expect
from this method, without having to trace down its implementation.

Not feeling strongly, but I think these are worth adding.

BUG=

Review-Url: https://codereview.chromium.org/2855293002
Cr-Commit-Position: refs/heads/master@{#469567}

chrome/android/javatests/src/org/chromium/chrome/browser/util/UrlUtilitiesTest.java

@@ -83,6 +83,10 @@ public class UrlUtilitiesTest {
                 UrlUtilities.isValidForIntentFallbackNavigation("http://awesome.example.com/"));
         Assert.assertFalse(UrlUtilities.isValidForIntentFallbackNavigation("inline:skates.co.uk"));
         Assert.assertFalse(UrlUtilities.isValidForIntentFallbackNavigation("javascript:alert(1)"));
+        Assert.assertFalse(
+                UrlUtilities.isValidForIntentFallbackNavigation("file://hostname/path/to/file"));
+        Assert.assertFalse(UrlUtilities.isValidForIntentFallbackNavigation("data:data"));
+        Assert.assertFalse(UrlUtilities.isValidForIntentFallbackNavigation("about:awesome"));
         Assert.assertFalse(UrlUtilities.isValidForIntentFallbackNavigation(""));
     }