Fix to allow the proxy authentication dialog to appear when hosting gaia in webview.

chrome/browser/chromeos/login/proxy_auth_dialog_browsertest.cc

Index: chrome/browser/chromeos/login/proxy_auth_dialog_browsertest.cc
diff --git a/chrome/browser/chromeos/login/proxy_auth_dialog_browsertest.cc b/chrome/browser/chromeos/login/proxy_auth_dialog_browsertest.cc
index 9fb5726d429c3bc3bb5e436ce42c2fe6f4218528..efdf11792c8f314e91dc5020c696bda2371fa3b4 100644
--- a/chrome/browser/chromeos/login/proxy_auth_dialog_browsertest.cc
+++ b/chrome/browser/chromeos/login/proxy_auth_dialog_browsertest.cc
@@ -126,10 +126,8 @@ IN_PROC_BROWSER_TEST_P(ProxyAuthOnUserBoardScreenTest,
   }
 }
 
-// TODO(paulmeyer): Re-enable webview version of this test
-// (once http://crbug.com/452452 is fixed.
 INSTANTIATE_TEST_CASE_P(ProxyAuthOnUserBoardScreenTestSuite,
                         ProxyAuthOnUserBoardScreenTest,
-                        testing::Values(false));
+                        testing::Bool());
 
 }  // namespace chromeos