Re-enable ExtensionApiTest.UpdateWindowShowState on Windows.

chrome/browser/extensions/extension_tabs_apitest.cc

Index: chrome/browser/extensions/extension_tabs_apitest.cc
diff --git a/chrome/browser/extensions/extension_tabs_apitest.cc b/chrome/browser/extensions/extension_tabs_apitest.cc
index 816d9767e692457b1f1b15d71db4bf7e9f987d6a..b25e3028ee501c4e72949a8137c41541e569b1c9 100644
--- a/chrome/browser/extensions/extension_tabs_apitest.cc
+++ b/chrome/browser/extensions/extension_tabs_apitest.cc
@@ -31,16 +31,9 @@
 #else
 #define MAYBE_FocusWindowDoesNotExitFullscreen FocusWindowDoesNotExitFullscreen
 #define MAYBE_UpdateWindowSizeExitsFullscreen UpdateWindowSizeExitsFullscreen
-
-// http://crbug.com/105356 , this test is failing browser_tests on Windows.
-#if defined(OS_WIN)
-#define MAYBE_UpdateWindowShowState FAILS_UpdateWindowShowState
-#else
 #define MAYBE_UpdateWindowShowState UpdateWindowShowState
 #endif
 
-#endif
-
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Tabs) {
   // The test creates a tab and checks that the URL of the new tab
   // is that of the new tab page.  Make sure the pref that controls