Remove support for special "sign in process" state.

chrome/browser/policy/policy_helpers.cc

Index: chrome/browser/policy/policy_helpers.cc
diff --git a/chrome/browser/policy/policy_helpers.cc b/chrome/browser/policy/policy_helpers.cc
index 5eb2051210a199d2e08ec671ade415e2b22414cd..a79640b76fdaa757f3f351ebb3d36c5769928318 100644
--- a/chrome/browser/policy/policy_helpers.cc
+++ b/chrome/browser/policy/policy_helpers.cc
@@ -13,7 +13,6 @@
 #endif
 
 #if !defined(OS_CHROMEOS) && !defined(OS_IOS)
-#include "components/signin/core/browser/signin_manager.h"
 #include "google_apis/gaia/gaia_urls.h"
 #endif
 
@@ -38,10 +37,6 @@ bool OverrideBlacklistForURL(const GURL& url, bool* block, int* reason) {
   static const char kServiceLoginAuth[] = "/ServiceLoginAuth";
 
   *block = false;
-  // Whitelist all the signin flow URLs flagged by the SigninManager.
-  if (SigninManager::IsWebBasedSigninFlowURL(url))
-    return true;
-
   // Additionally whitelist /ServiceLoginAuth.
   if (url.GetOrigin() != GaiaUrls::GetInstance()->gaia_url().GetOrigin())
     return false;