Incorporate BlobChannel into Blimp image encode/decode pipeline.

blimp/client/session/blimp_client_session.h

 // Copyright 2015 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_SESSION_BLIMP_CLIENT_SESSION_H_
 #define BLIMP_CLIENT_SESSION_BLIMP_CLIENT_SESSION_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
+#include "blimp/client/feature/compositor/blob_image_serialization_processor.h"
 #include "blimp/client/session/assignment_source.h"
 #include "blimp/common/proto/blimp_message.pb.h"
 #include "blimp/net/blimp_connection_statistics.h"
 #include "blimp/net/blimp_message_processor.h"
 
 namespace net {
 class IPEndPoint;
 }
 
 namespace blimp {
 
 class BlimpMessageProcessor;
 class BlimpMessageThreadPipe;
+class BlobChannelReceiver;
 class BrowserConnectionHandler;
 class ClientConnectionManager;
+class HeliumBlobReceiverDelegate;
 class ThreadPipeManager;
 
 namespace client {
 
 class ClientNetworkComponents;
 class NavigationFeature;
 class ImeFeature;
 class RenderWidgetFeature;
 class SettingsFeature;
 class TabControlFeature;
 
 class NetworkEventObserver {
  public:
   NetworkEventObserver() {}
   virtual ~NetworkEventObserver() {}
 
   virtual void OnConnected() = 0;
   virtual void OnDisconnected(int result) = 0;
 };
 
 // BlimpClientSession represents a single active session of Blimp on the client
 // regardless of whether or not the client application is in the background or
 // foreground.  The only time this session is invalid is during initialization
 // and shutdown of this particular client process (or Activity on Android).
 //
 // This session glues together the feature proxy components and the network
 // layer.  The network components must be interacted with on the IO thread.  The
 // feature proxies must be interacted with on the UI thread.
-class BlimpClientSession : public NetworkEventObserver {
+class BlimpClientSession
+    : public NetworkEventObserver,
+      public BlobImageSerializationProcessor::ErrorDelegate {
  public:
   explicit BlimpClientSession(const GURL& assigner_endpoint);
 
   // Uses the AssignmentSource to get an Assignment and then uses the assignment
   // configuration to connect to the Blimplet.
   // |client_auth_token| is the OAuth2 access token to use when querying
   // for an assignment.  This token needs the OAuth2 scope of userinfo.email and
   // only needs to be an access token, not a refresh token.
   void Connect(const std::string& client_auth_token);
 
@@ skipping 18 matching lines @@
   virtual void OnAssignmentConnectionAttempted(AssignmentSource::Result result,
                                                const Assignment& assignment);
 
  private:
   void RegisterFeatures();
 
   // NetworkEventObserver implementation.
   void OnConnected() override;
   void OnDisconnected(int result) override;
 
+  // BlobImageSerializationProcessor::ErrorDelegate implementation.
+  void OnImageDecodeError() override;
+
   base::Thread io_thread_;
+
+  // Receives blob BlimpMessages and relays them to BlobChannelReceiver.
+  // Owned by BlobChannelReceiver, therefore stored as a raw pointer here.
+  HeliumBlobReceiverDelegate* blob_delegate_ = nullptr;
+
+  // Retrieves and decodes image data from |blob_receiver_|. Must outlive
+  // |blob_receiver_|.
+  BlobImageSerializationProcessor blob_image_processor_;
+
+  std::unique_ptr<BlobChannelReceiver> blob_receiver_;
   std::unique_ptr<TabControlFeature> tab_control_feature_;
   std::unique_ptr<NavigationFeature> navigation_feature_;
   std::unique_ptr<ImeFeature> ime_feature_;
   std::unique_ptr<RenderWidgetFeature> render_widget_feature_;
   std::unique_ptr<SettingsFeature> settings_feature_;
 
   // The AssignmentSource is used when the user of BlimpClientSession calls
   // Connect() to get a valid assignment and later connect to the engine.
   std::unique_ptr<AssignmentSource> assignment_source_;
 
   // Collects details of network, such as number of commits and bytes
   // transferred over network. Ownership is maintained on the IO thread.
   BlimpConnectionStatistics* blimp_connection_statistics_;
 
   // Container struct for network components.
   // Must be deleted on the IO thread.
   std::unique_ptr<ClientNetworkComponents> net_components_;
 
   std::unique_ptr<ThreadPipeManager> thread_pipe_manager_;
 
   base::WeakPtrFactory<BlimpClientSession> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpClientSession);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_SESSION_BLIMP_CLIENT_SESSION_H_