Remove references to IsNewAvatarMenu since the flag was removed.

chrome/browser/signin/signin_global_error.h

Index: chrome/browser/signin/signin_global_error.h
diff --git a/chrome/browser/signin/signin_global_error.h b/chrome/browser/signin/signin_global_error.h
index 86846c80437885952ed3449185e4b724959ef9f3..4d642fc2d5c71a0c747dedfed40f1a791a4ee0f6 100644
--- a/chrome/browser/signin/signin_global_error.h
+++ b/chrome/browser/signin/signin_global_error.h
@@ -62,9 +62,6 @@ class SigninGlobalError : public GlobalErrorWithStandardBubble,
   // The SigninErrorController that provides auth status.
   SigninErrorController* error_controller_;
 
-  // True if signin global error was added to the global error service.
-  bool is_added_to_global_error_service_;
-
   DISALLOW_COPY_AND_ASSIGN(SigninGlobalError);
 };