Disable flaky ExtensionPreferenceApiTest.DataReductionProxy on Windows.

chrome/browser/extensions/api/preference/preference_apitest.cc

 // Copyright (c) 2012 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 "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/net/prediction_options.h"
@@ skipping 316 matching lines @@
   // Test 6 - clearDefault
   EXPECT_TRUE(listener10.WaitUntilSatisfied()); // Regular ready
   EXPECT_TRUE(listener_incognito10.WaitUntilSatisfied()); // Incognito ready
   listener10.Reply("ok");
   listener_incognito10.Reply("ok");
 
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
   EXPECT_TRUE(catcher_incognito.GetNextResult()) << catcher.message();
 }
 
-IN_PROC_BROWSER_TEST_F(ExtensionPreferenceApiTest, DataReductionProxy) {
+#if defined(OS_WIN)  // http://crbug.com/477844
+#define MAYBE_DataReductionProxy DISABLED_DataReductionProxy
+#else
+#define MAYBE_DataReductionProxy DataReductionProxy
+#endif
+IN_PROC_BROWSER_TEST_F(ExtensionPreferenceApiTest, MAYBE_DataReductionProxy) {
   EXPECT_TRUE(RunExtensionTest("preference/data_reduction_proxy")) <<
       message_;
 }