X-Chrome-Connected is stripped when it should not be in headers.

components/signin/core/browser/signin_header_helper.h

Index: components/signin/core/browser/signin_header_helper.h
diff --git a/components/signin/core/browser/signin_header_helper.h b/components/signin/core/browser/signin_header_helper.h
index 8d5d37c1fdcc523284ac89a205843ee7ce2fecc4..e177d925dd0436782bf1c526434a3be3bc99e75c 100644
--- a/components/signin/core/browser/signin_header_helper.h
+++ b/components/signin/core/browser/signin_header_helper.h
@@ -30,6 +30,8 @@ enum ProfileMode {
   PROFILE_MODE_ADD_ACCOUNT_DISABLED = 1 << 1
 };
 
+extern const char kChromeConnectedHeader[];
+
 // The ServiceType specified by GAIA in the response header accompanying the 204
 // response. This indicates the action Chrome is supposed to lead the user to
 // perform.
@@ -73,6 +75,10 @@ struct ManageAccountsParams {
 bool SettingsAllowSigninCookies(
     const content_settings::CookieSettings* cookie_settings);
 
+// Checks if the url has the required properties to have an
+// X-CHROME-CONNECTED header.
+bool IsUrlElligibleForXChromeConnectedHeader(const GURL& url);
+
 // Returns the X-CHROME-CONNECTED cookie, or an empty string if it should not be
 // added to the request to |url|.
 std::string BuildMirrorRequestCookieIfPossible(