Mark PrerenderBrowserTest.PrerenderUnload as flaky on Win

chrome/browser/prerender/prerender_browsertest.cc

Index: chrome/browser/prerender/prerender_browsertest.cc
diff --git a/chrome/browser/prerender/prerender_browsertest.cc b/chrome/browser/prerender/prerender_browsertest.cc
index dea56a99cd7659df883faf76d6f16ef4bb4cf659..85bb7abe6317b1b620809b2d7c0b8640bee25068 100644
--- a/chrome/browser/prerender/prerender_browsertest.cc
+++ b/chrome/browser/prerender/prerender_browsertest.cc
@@ -2021,7 +2021,12 @@ IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderFavicon) {
 
 // Checks that when a prerendered page is swapped in to a referring page, the
 // unload handlers on the referring page are executed.
-IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderUnload) {
+#if defined(OS_WIN)
+#define MAYBE_PrerenderUnload FLAKY_PrerenderUnload
+#else
+#define MAYBE_PrerenderUnload PrerenderUnload
+#endif
+IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, MAYBE_PrerenderUnload) {
   set_loader_path("files/prerender/prerender_loader_with_unload.html");
   PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);
   string16 expected_title = ASCIIToUTF16("Unloaded");