Disable WebViewTest.WebViewInBackgroundPage on Windows because it times out often

chrome/browser/apps/web_view_browsertest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "apps/ui/native_app_window.h"
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/chrome_content_browser_client.h"
@@ skipping 2235 matching lines @@
   TestHelper("testFindAPI_findupdate", "web_view/shim", NO_TEST_SERVER);
 }
 
 // <webview> screenshot capture fails with ubercomp.
 // See http://crbug.com/327035.
 IN_PROC_BROWSER_TEST_F(WebViewCaptureTest,
                        DISABLED_Shim_ScreenshotCapture) {
   TestHelper("testScreenshotCapture", "web_view/shim", NO_TEST_SERVER);
 }
 
-IN_PROC_BROWSER_TEST_F(WebViewTest, WebViewInBackgroundPage) {
+#if defined(OS_WIN)
+// Test is disabled on Windows because it times out often.
+// http://crbug.com/403325
+#define MAYBE_WebViewInBackgroundPage \
+    DISABLED_WebViewInBackgroundPage
+#else
+#define MAYBE_WebViewInBackgroundPage WebViewInBackgroundPage
+#endif
+IN_PROC_BROWSER_TEST_F(WebViewTest, MAYBE_WebViewInBackgroundPage) {
   ASSERT_TRUE(RunExtensionTest("platform_apps/web_view/background"))
       << message_;
 }