Disable flaky LayerTreeHostTestEarlyDamageCheckStops on Windows

BUG=813578
TBR=vmpstr

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: I17a59d1d7d20c4bdd36388b2133892625253977d
Reviewed-on: https://chromium-review.googlesource.com/924197
Commit-Queue: Thiemo Nagel <tnagel@chromium.org>
Reviewed-by: Thiemo Nagel <tnagel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537658}

cc/trees/layer_tree_host_unittest.cc

@@ -16,6 +16,7 @@
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_task_runner_handle.h"
+#include "build/build_config.h"
 #include "cc/animation/timing_function.h"
 #include "cc/input/scroll_elasticity_helper.h"
 #include "cc/layers/content_layer_client.h"
@@ -1265,9 +1266,12 @@ class LayerTreeHostTestEarlyDamageCheckStops : public LayerTreeHostTest {
   int damaged_frame_limit_;
 };
 
+// Flaky on Win7 Tests (dbg)(1). https://crbug.com/813578
+#if !defined(OS_WIN)
 // This behavior is specific to Android WebView, which only uses
 // multi-threaded compositor.
 MULTI_THREAD_TEST_F(LayerTreeHostTestEarlyDamageCheckStops);
+#endif
 
 // Verify CanDraw() is false until first commit.
 class LayerTreeHostTestCantDrawBeforeCommit : public LayerTreeHostTest {