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

components/signin/core/browser/signin_header_helper.cc

Index: components/signin/core/browser/signin_header_helper.cc
diff --git a/components/signin/core/browser/signin_header_helper.cc b/components/signin/core/browser/signin_header_helper.cc
index 578cb5806cf889ec323d359d175515b17120ffdd..81aee9eef8eb6e19e7c222f8ad43d4a92fdc34ba 100644
--- a/components/signin/core/browser/signin_header_helper.cc
+++ b/components/signin/core/browser/signin_header_helper.cc
@@ -26,7 +26,6 @@ namespace {
 // Dictionary of fields in a mirror response header.
 typedef std::map<std::string, std::string> MirrorResponseHeaderDictionary;
 
-const char kChromeConnectedHeader[] = "X-Chrome-Connected";
 const char kChromeManageAccountsHeader[] = "X-Chrome-Manage-Accounts";
 const char kContinueUrlAttrName[] = "continue_url";
 const char kEmailAttrName[] = "email";
@@ -132,6 +131,8 @@ std::string BuildMirrorRequestIfPossible(
 
 namespace signin {
 
+extern const char kChromeConnectedHeader[] = "X-Chrome-Connected";
+
 ManageAccountsParams::ManageAccountsParams()
     : service_type(GAIA_SERVICE_TYPE_NONE),
       email(""),