Disable setting incognito prefs for extensions for now.

chrome/browser/extensions/extension_proxy_apitest.cc

Index: chrome/browser/extensions/extension_proxy_apitest.cc
diff --git a/chrome/browser/extensions/extension_proxy_apitest.cc b/chrome/browser/extensions/extension_proxy_apitest.cc
index 174be3084e4d8e274919ffa27e29c4d06f85e8cd..6f1b9bb362a7a52f341321bf3dd7dfbee08b91f8 100644
--- a/chrome/browser/extensions/extension_proxy_apitest.cc
+++ b/chrome/browser/extensions/extension_proxy_apitest.cc
@@ -190,8 +190,9 @@ IN_PROC_BROWSER_TEST_F(ProxySettingsApiTest, ProxyFixedIndividual) {
 }
 
 // Tests setting values only for incognito mode
+// TODO(battre): re-enable when incognito is supported again
 IN_PROC_BROWSER_TEST_F(ProxySettingsApiTest,
-    ProxyFixedIndividualIncognitoOnly) {
+    DISABLED_ProxyFixedIndividualIncognitoOnly) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
@@ -216,8 +217,9 @@ IN_PROC_BROWSER_TEST_F(ProxySettingsApiTest,
 }
 
 // Tests setting values also for incognito mode
+// TODO(battre): re-enable when incognito is supported again
 IN_PROC_BROWSER_TEST_F(ProxySettingsApiTest,
-    ProxyFixedIndividualIncognitoAlso) {
+    DISABLED_ProxyFixedIndividualIncognitoAlso) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);