Correct disable condition for UIResourceLostBeforeCommit.RunSingleThread_DelegatingRenderer.

It's still failing:
  https://ci.chromium.org/buildbot/chromium.win/Win7%20Tests%20%28dbg%29%281%29/66304

The previous condition disabled it on non-Windows debug, but Windows debug was intended:
  https://chromium.googlesource.com/chromium/src/+/25ddb137581f80010f5c9665806652ca2e231eb4

Bug: 803532
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: I623fa8cfab38e920d5398594b56918a43054bfef
Tbr: smcgruer@chromium.org,danakj@chromium.org
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/913968Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536099}

cc/trees/layer_tree_host_unittest_context.cc

@@ -1347,7 +1347,7 @@ class UIResourceLostBeforeCommit : public UIResourceLostTestSimple {
 };
 
 // http://crbug.com/803532 : Flaky on Win 7 (dbg).
-#if defined(NDEBUG) || defined(OS_WIN)
+#if defined(NDEBUG) || !defined(OS_WIN)
 SINGLE_THREAD_TEST_F(UIResourceLostBeforeCommit);
 #endif
 MULTI_THREAD_TEST_F(UIResourceLostBeforeCommit);