Add TabControlFeature to BlimpClientContextImpl

blimp/client/core/contents/blimp_contents_manager.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_CONTENTS_BLIMP_CONTENTS_MANAGER_H_
 #define BLIMP_CLIENT_CORE_CONTENTS_BLIMP_CONTENTS_MANAGER_H_
 
 #include "blimp/client/core/contents/blimp_contents_impl.h"
 
 namespace blimp {
 namespace client {
 
+class TabControlFeature;
+
 // BlimpContentsManager does the real work of creating BlimpContentsImpl, and
 // then passes the ownership to the caller. It also owns the observers to
 // monitor the life time of the contents it creates.
 class BlimpContentsManager {
  public:
-  BlimpContentsManager();
+  explicit BlimpContentsManager(TabControlFeature* tab_control_feature);
   ~BlimpContentsManager();
 
+  // Builds a BlimpContentsImpl and notifies the engine.
   std::unique_ptr<BlimpContentsImpl> CreateBlimpContents();
 
   // The caller can query the contents through its id.
   BlimpContentsImpl* GetBlimpContents(int id);
 
  private:
   class BlimpContentsDeletionObserver;
   friend class BlimpContentsDeletionObserver;
 
   // When creating the BlimpContentsImpl, an id is created for the content.
   int CreateBlimpContentsId();
 
-  // When a BlimpContentsImpl is destroyed, its observer is able to retrieve the
-  // id, and use this to destroy the observer entry from the observer_map_.
+  // When a BlimpContentsImpl is destroyed, its observer will pass the contents
+  // pointer to the manager. The contents pointer is used to retrieve its id,
+  // which in turn is used to destroy the observer entry from the observer_map_
+  // and close the tab.
+  void OnContentsDestroyed(BlimpContents* contents);
+
+  // Destroy the observer entry from the observer_map_ when a BlimpContentsImpl
+  // is destroyed.
   void EraseObserverFromMap(int id);
   base::WeakPtr<BlimpContentsManager> GetWeakPtr();
 
   // BlimpContentsManager owns the BlimpContentsDeletionObserver for the
   // contents it creates, with the content id being the key to help manage the
   // lifetime of the observers.
   std::map<int, std::unique_ptr<BlimpContentsDeletionObserver>> observer_map_;
 
+  TabControlFeature* tab_control_feature_ = nullptr;
+
   base::WeakPtrFactory<BlimpContentsManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpContentsManager);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_CORE_CONTENTS_BLIMP_CONTENTS_MANAGER_H_