tracing: Fix TracingPreferences test

The share trace notification now has an action.
Given that the test doesn't test the action (and
any future ones), this removes the expectation that
there aren't any.

TBR=twellington@chromium.org

Bug: 907659
Change-Id: Ieb5b9f450e605e47cd068f4d99c1c98708961260
Reviewed-on: https://chromium-review.googlesource.com/c/1347250
Commit-Queue: Eric Seckler <eseckler@chromium.org>
Reviewed-by: Eric Seckler <eseckler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610349}

chrome/android/javatests/src/org/chromium/chrome/browser/preferences/developer/TracingPreferencesTest.java

@@ -227,7 +227,6 @@ public class TracingPreferencesTest {
         notification = waitForNotification().notification;
         Assert.assertEquals(0, notification.flags & FLAG_ONGOING_EVENT);
         Assert.assertNotEquals(null, notification.deleteIntent);
-        Assert.assertEquals(0, NotificationCompat.getActionCount(notification));
         PendingIntent deleteIntent = notification.deleteIntent;
 
         // The temporary tracing output file should now exist.