Propagate error messages to UI for blimp.

blimp/client/app/linux/blimp_client_context_delegate_linux.h

Index: blimp/client/app/linux/blimp_client_context_delegate_linux.h
diff --git a/blimp/client/app/linux/blimp_client_context_delegate_linux.h b/blimp/client/app/linux/blimp_client_context_delegate_linux.h
index dda453a739451034193ffbd4a82d9a3a76141ba8..d781e86752eb6cd2ab64dba8cd0d1ab8db62eab7 100644
--- a/blimp/client/app/linux/blimp_client_context_delegate_linux.h
+++ b/blimp/client/app/linux/blimp_client_context_delegate_linux.h
@@ -23,8 +23,10 @@ class BlimpClientContextDelegateLinux : public BlimpClientContextDelegate {
   void OnAssignmentConnectionAttempted(AssignmentRequestResult result,
                                        const Assignment& assignment) override;
   std::unique_ptr<IdentityProvider> CreateIdentityProvider() override;
-  void OnAuthenticationError(
-      BlimpClientContextDelegate::AuthError error) override;
+  void OnAuthenticationError(const GoogleServiceAuthError& error) override;
+  void OnConnected() override;
+  void OnEngineDisconnected(int result) override;
+  void OnNetworkDisconnected(int result) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BlimpClientContextDelegateLinux);