Propagate error messages to UI for blimp.

blimp/client/core/context/blimp_client_context_impl.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_CORE_CONTEXT_BLIMP_CLIENT_CONTEXT_IMPL_H_
 #define BLIMP_CLIENT_CORE_CONTEXT_BLIMP_CLIENT_CONTEXT_IMPL_H_
 
 #include <memory>
 #include <string>
 #include <unordered_map>
@@ skipping 26 matching lines @@
 class NavigationFeature;
 class RenderWidgetFeature;
 class SettingsFeature;
 class TabControlFeature;
 
 // BlimpClientContextImpl is the implementation of the main context-class for
 // the blimp client.
 class BlimpClientContextImpl
     : public BlimpClientContext,
       public BlimpSettingsDelegate,
-      public BlobImageSerializationProcessor::ErrorDelegate {
+      public BlobImageSerializationProcessor::ErrorDelegate,
+      public NetworkEventObserver {
  public:
   // The |io_thread_task_runner| must be the task runner to use for IO
   // operations.
   // The |file_thread_task_runner| must be the task runner to use for file
   // operations.
   BlimpClientContextImpl(
       scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
       std::unique_ptr<CompositorDependencies> compositor_dependencies);
   ~BlimpClientContextImpl() override;
@@ skipping 34 matching lines @@
   // May be called on any thread.
   void DropConnection();
 
   // Create IdentitySource which provides user sign in states and OAuth2 token
   // service.
   void CreateIdentitySource();
 
   // BlobImageSerializationProcessor::ErrorDelegate implementation.
   void OnImageDecodeError() override;
 
+  // NetworkEventObserver implementation.
+  void OnConnected() override;
+  void OnDisconnected(int result) override;
+
   // Provides functionality from the embedder.
   BlimpClientContextDelegate* delegate_ = nullptr;
 
   // The task runner to use for IO operations.
   scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner_;
 
   // The task runner to use for file operations.
   scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner_;
 
   // The AssignmentSource is used when the user of BlimpClientContextImpl calls
@@ skipping 28 matching lines @@
 
   base::WeakPtrFactory<BlimpClientContextImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpClientContextImpl);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_CORE_CONTEXT_BLIMP_CLIENT_CONTEXT_IMPL_H_