Add TabControlFeature to BlimpClientContextImpl

blimp/client/core/blimp_client_context_impl.h

Index: blimp/client/core/blimp_client_context_impl.h
diff --git a/blimp/client/core/blimp_client_context_impl.h b/blimp/client/core/blimp_client_context_impl.h
index 86c3cc8bee4ccca718081e240a4d305612f7e67f..98b12ff6fa12839ed3153ddbf87d2a6859019b3c 100644
--- a/blimp/client/core/blimp_client_context_impl.h
+++ b/blimp/client/core/blimp_client_context_impl.h
@@ -24,6 +24,7 @@ namespace blimp {
 namespace client {
 
 class BlimpContentsManager;
+class TabControlFeature;
 
 // BlimpClientContextImpl is the implementation of the main context-class for
 // the blimp client.
@@ -48,6 +49,8 @@ class BlimpClientContextImpl : public BlimpClientContext,
   void OnConnected() override;
   void OnDisconnected(int result) override;
 
+  TabControlFeature* GetTabControlFeature() const;
+
  protected:
   // Returns the URL to use for connections to the assigner. Used to construct
   // the AssignmentSource.
@@ -59,6 +62,8 @@ class BlimpClientContextImpl : public BlimpClientContext,
   virtual void ConnectWithAssignment(AssignmentRequestResult result,
                                      const Assignment& assignment);
 
+  void RegisterFeatures();
+
   // Provides functionality from the embedder.
   BlimpClientContextDelegate* delegate_ = nullptr;
 
@@ -80,6 +85,8 @@ class BlimpClientContextImpl : public BlimpClientContext,
 
   std::unique_ptr<ThreadPipeManager> thread_pipe_manager_;
 
+  std::unique_ptr<TabControlFeature> tab_control_feature_;
+
   base::WeakPtrFactory<BlimpClientContextImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpClientContextImpl);