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..9100d704541352bbc67886c156fc6d7dd20f709a 100644
--- a/blimp/client/core/blimp_client_context_impl.h
+++ b/blimp/client/core/blimp_client_context_impl.h
@@ -12,6 +12,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
+#include "blimp/client/core/contents/tab_control_feature.h"
 #include "blimp/client/core/session/client_network_components.h"
 #include "blimp/client/core/session/network_event_observer.h"
 #include "blimp/client/public/blimp_client_context.h"
@@ -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);