Implementation for chrome.certificateProvider.requestPin/stopPinRequest

chrome/browser/chromeos/certificate_provider/sign_requests.h

Index: chrome/browser/chromeos/certificate_provider/sign_requests.h
diff --git a/chrome/browser/chromeos/certificate_provider/sign_requests.h b/chrome/browser/chromeos/certificate_provider/sign_requests.h
index dcb47d5adffab8fed0325b790b9ac831e3577931..cfae8722d85123312f42e07a7a1eb8fd5681da5a 100644
--- a/chrome/browser/chromeos/certificate_provider/sign_requests.h
+++ b/chrome/browser/chromeos/certificate_provider/sign_requests.h
@@ -47,10 +47,6 @@ class SignRequests {
     // Maps from request id to the SignCallback that must be called with the
     // signature or error.
     std::map<int, net::SSLPrivateKey::SignCallback> pending_requests;
-
-    // The request id that will be used for the next sign request to this
-    // extension.
-    int next_free_id = 0;
   };
 
   // Contains the state of all sign requests per extension.