Propagate error messages to UI for blimp.

blimp/client/public/blimp_client_context_delegate.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BLIMP_CLIENT_PUBLIC_BLIMP_CLIENT_CONTEXT_DELEGATE_H_
 #define BLIMP_CLIENT_PUBLIC_BLIMP_CLIENT_CONTEXT_DELEGATE_H_
 
 #include "base/macros.h"
 #include "blimp/client/public/session/assignment.h"
 
 class IdentityProvider;
+class GoogleServiceAuthError;
 
 namespace blimp {
 namespace client {
 class BlimpContents;
 
 // BlimpClientContextDelegate is how the BlimpClientContext gets the
 // functionality it needs from its embedder.
 class BlimpClientContextDelegate {
  public:
-  // Authentication error propagated to the embedder.
-  enum AuthError {
-    NOT_SIGNED_IN = 0,
-    OAUTH_TOKEN_FAIL,
-  };
-
   virtual ~BlimpClientContextDelegate() = default;
 
   // Attaches any required base::SupportsUserData::Data to the BlimpContents.
   virtual void AttachBlimpContentsHelpers(BlimpContents* blimp_contents) = 0;
 
   // Called whenever an assignment request has finished and the resulting
   // Assignment is ready to be used in an attempt to connect to the engine. The
   // |result| is the result for the assignment request itself, not for the
   // connection attempt. Only when |result| is ASSIGNMENT_REQUEST_RESULT_OK
   // will an attempt actually be made to connect to the engine using the
   // Assignment.
   virtual void OnAssignmentConnectionAttempted(
       AssignmentRequestResult result,
       const Assignment& assignment) = 0;
 
   // Create IdentityProvider for OAuth2 token retrieval, used in Authenticator.
   virtual std::unique_ptr<IdentityProvider> CreateIdentityProvider() = 0;
 
   // Propagate authentication error to the embedder.
-  virtual void OnAuthenticationError(
-      BlimpClientContextDelegate::AuthError error) = 0;
+  virtual void OnAuthenticationError(const GoogleServiceAuthError& error) = 0;
+
+  // Called when the client connected to the engine.
+  virtual void OnConnected() = 0;
+
+  // Called when the client is disconnected from the engine.
+  // See EndConnectionMessage::Reason.
+  virtual void OnEngineDisconnected(int result) = 0;
+
+  // Called when the network is disconnected.
+  // See /net/base/net_errors.h.
+  virtual void OnNetworkDisconnected(int result) = 0;
 
  protected:
   BlimpClientContextDelegate() = default;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BlimpClientContextDelegate);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_PUBLIC_BLIMP_CLIENT_CONTEXT_DELEGATE_H_