Easy Sign-in: Use TPM RSA key to sign nonce in sign-in protocol

chrome/browser/signin/easy_unlock_service.h

Index: chrome/browser/signin/easy_unlock_service.h
diff --git a/chrome/browser/signin/easy_unlock_service.h b/chrome/browser/signin/easy_unlock_service.h
index 216d3807316fe6ed1ca76fcba7c3f24dbe1877e7..06915e75896e4dc92c9aa108a878067495b3a76d 100644
--- a/chrome/browser/signin/easy_unlock_service.h
+++ b/chrome/browser/signin/easy_unlock_service.h
@@ -255,6 +255,8 @@ class EasyUnlockService : public KeyedService {
   // Updates the service to state for handling system suspend.
   void PrepareForSuspend();
 
+  void EnsureTpmKeyPresentIfNeeded();
+
   Profile* profile_;
 
   // Created lazily in |GetScreenlockStateHandler|.
@@ -275,6 +277,8 @@ class EasyUnlockService : public KeyedService {
   // Whether the service has been shut down.
   bool shut_down_;
 
+  bool tpm_key_checked_;
+
   ObserverList<EasyUnlockServiceObserver> observers_;
 
   base::WeakPtrFactory<EasyUnlockService> weak_ptr_factory_;