Mark ExtensionManagementTest.InstallRequiresConfirm flaky on Windows.

chrome/browser/extensions/api/management/management_browsertest.cc

Index: chrome/browser/extensions/api/management/management_browsertest.cc
===================================================================
--- chrome/browser/extensions/api/management/management_browsertest.cc	(revision 151092)
+++ chrome/browser/extensions/api/management/management_browsertest.cc	(working copy)
@@ -109,7 +109,13 @@
   EXPECT_TRUE(IsExtensionAtVersion(extension, "1.0"));
 }
 
-IN_PROC_BROWSER_TEST_F(ExtensionManagementTest, InstallRequiresConfirm) {
+#if defined(OS_WIN)
+// http://crbug.com/141913
+#define MAYBE_InstallRequiresConfirm FLAKY_InstallRequiresConfirm
+#else
+#define MAYBE_InstallRequiresConfirm InstallRequiresConfirm
+#endif
+IN_PROC_BROWSER_TEST_F(ExtensionManagementTest, MAYBE_InstallRequiresConfirm) {
   // Installing the extension without an auto confirming UI should result in
   // it being disabled, since good.crx has permissions that require approval.
   ExtensionService* service = browser()->profile()->GetExtensionService();