Re-enable EscapingMouseLockAndFullscreen on Win

This test showed to be flaky only on Linux bots. It should be safe to be
re-enabled on Windows.

Bug: 976883
Change-Id: I69d28a3b31ce31af2529a16750b5b65423b85e51
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2387180Reviewed-by: Peter Boström <pbos@chromium.org>
Commit-Queue: Wei Li <weili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803693}

chrome/browser/ui/exclusive_access/fullscreen_controller_interactive_browsertest.cc

@@ -332,8 +332,14 @@ IN_PROC_BROWSER_TEST_F(FullscreenControllerInteractiveTest, EscapingMouseLock) {
 // Disabled due to flakiness.
 // TODO(crbug.com/976883): Fix and re-enable this.
 // Tests mouse lock and fullscreen modes can be escaped with ESC key.
+#if defined(OS_WIN)
+#define MAYBE_EscapingMouseLockAndFullscreen EscapingMouseLockAndFullscreen
+#else
+#define MAYBE_EscapingMouseLockAndFullscreen \
+  DISABLED_EscapingMouseLockAndFullscreen
+#endif
 IN_PROC_BROWSER_TEST_F(FullscreenControllerInteractiveTest,
-                       DISABLED_EscapingMouseLockAndFullscreen) {
+                       MAYBE_EscapingMouseLockAndFullscreen) {
   ASSERT_TRUE(embedded_test_server()->Start());
   ui_test_utils::NavigateToURL(
       browser(), embedded_test_server()->GetURL(kFullscreenMouseLockHTML));
@@ -385,7 +391,6 @@ IN_PROC_BROWSER_TEST_F(FullscreenControllerInteractiveTest,
 
 // Times out sometimes on Linux. http://crbug.com/135115
 // Mac: http://crbug.com/103912
-// Windows: Failing flakily on try jobs also.
 // Tests mouse lock then fullscreen in same request.
 #if defined(OS_WIN)
 #define MAYBE_MouseLockAndFullscreen MouseLockAndFullscreen