AccountTracker: Fix unittest to match its name

While preparing a refactoring of AccountTracker, I noticed that this
unittest is not doing what its name says it's doing; rather, it's just
a copy of the unittest above it. This CL changes the test to match
the name (as best as I could infer the intent of the test from the
name).

Change-Id: I46d809c1fa9d786688ddca82641f3df4d96c5821
Reviewed-on: https://chromium-review.googlesource.com/1142776
Commit-Queue: Peter Beverloo <peter@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577157}

components/gcm_driver/account_tracker_unittest.cc

@@ -433,10 +433,11 @@ TEST_F(AccountTrackerTest, PrimaryTokenAvailableAndRevokedThenLogin) {
   NotifyTokenAvailable(kPrimaryAccountKey);
   EXPECT_TRUE(observer()->CheckEvents());
 
+  NotifyTokenRevoked(kPrimaryAccountKey);
+  EXPECT_TRUE(observer()->CheckEvents());
+
   NotifyLogin(kPrimaryAccountKey);
-  ReturnOAuthUrlFetchSuccess(kPrimaryAccountKey);
-  EXPECT_TRUE(
-      observer()->CheckEvents(TrackingEvent(SIGN_IN, kPrimaryAccountKey)));
+  EXPECT_TRUE(observer()->CheckEvents());
 }
 #endif