Remove parts of //cc we aren't using

cc/base/ref_counted_managed.h

-// Copyright 2013 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 CC_BASE_REF_COUNTED_MANAGED_H_
-#define CC_BASE_REF_COUNTED_MANAGED_H_
-
-#include "base/logging.h"
-#include "base/memory/ref_counted.h"
-#include "cc/base/cc_export.h"
-
-namespace cc {
-
-template <typename T> class RefCountedManaged;
-
-template <typename T>
-class CC_EXPORT RefCountedManager {
- protected:
-  RefCountedManager() : live_object_count_(0) {}
-  ~RefCountedManager() {
-    CHECK_EQ(0, live_object_count_);
-  }
-
-  virtual void Release(T* object) = 0;
-
- private:
-  friend class RefCountedManaged<T>;
-  int live_object_count_;
-};
-
-template <typename T>
-class CC_EXPORT RefCountedManaged : public base::subtle::RefCountedBase {
- public:
-  explicit RefCountedManaged(RefCountedManager<T>* manager)
-      : manager_(manager) {
-    manager_->live_object_count_++;
-  }
-
-  void AddRef() const {
-    base::subtle::RefCountedBase::AddRef();
-  }
-
-  void Release() {
-    if (base::subtle::RefCountedBase::Release()) {
-      DCHECK_GT(manager_->live_object_count_, 0);
-      manager_->live_object_count_--;
-
-      // This must be the last statement in case manager deletes
-      // the object immediately.
-      manager_->Release(static_cast<T*>(this));
-    }
-  }
-
- protected:
-  ~RefCountedManaged() {}
-
- private:
-  RefCountedManager<T>* manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(RefCountedManaged<T>);
-};
-
-}  // namespace cc
-
-#endif  // CC_BASE_REF_COUNTED_MANAGED_H_