Reenable TwoClientAppsSyncTest.StartWithDifferentApps on Win

This CL re-enables a previously flaky test on Windows. The underlying
cause has been fixed so let's give it a try if it stops flaking.

Bug: 434438
Change-Id: I09a85811db998960711586007005853ca4bb5499
Reviewed-on: https://chromium-review.googlesource.com/c/1304475Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603537}

chrome/browser/sync/test/integration/two_client_apps_sync_test.cc

@@ -6,7 +6,6 @@
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
-#include "build/build_config.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/bookmark_app_helper.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ -95,13 +94,7 @@ IN_PROC_BROWSER_TEST_P(TwoClientAppsSyncTest, E2E_ENABLED(StartWithSameApps)) {
 // Install some apps on both clients, some on only one client, some on only the
 // other, and sync.  Both clients should end up with all apps, and the app and
 // page ordinals should be identical.
-// Flakily crashes on Windows, see crbug.com/434438.
-#if defined(OS_WIN)
-#define MAYBE_StartWithDifferentApps DISABLED_StartWithDifferentApps
-#else
-#define MAYBE_StartWithDifferentApps StartWithDifferentApps
-#endif
-IN_PROC_BROWSER_TEST_P(TwoClientAppsSyncTest, MAYBE_StartWithDifferentApps) {
+IN_PROC_BROWSER_TEST_P(TwoClientAppsSyncTest, StartWithDifferentApps) {
   ASSERT_TRUE(SetupClients());
 
   int i = 0;