Remove all //blimp code.

blimp/common/compositor/reference_tracker.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_COMMON_COMPOSITOR_REFERENCE_TRACKER_H_
-#define BLIMP_COMMON_COMPOSITOR_REFERENCE_TRACKER_H_
-
-#include <stdint.h>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-#include "base/macros.h"
-#include "blimp/common/blimp_common_export.h"
-
-namespace blimp {
-
-// ReferenceTracker provides functionality to count the number of references to
-// a given uint32_t, and a way of retrieving the delta in the number of items
-// with a positive reference count since last call to CommitRefCounts().
-// CommitRefCounts() functions provides the deltas since last call to Commit(),
-// as sets of added and removed entries.
-// The important thing for any given item is whether it is in a state of having
-// positive reference count at the time of the call to CommitRefCounts(), not
-// how the reference count changed overtime in-between two calls to
-// CommitRefCounts().
-class BLIMP_COMMON_EXPORT ReferenceTracker {
- public:
-  ReferenceTracker();
-  ~ReferenceTracker();
-
-  // Increment the reference count for an |item|.
-  void IncrementRefCount(uint32_t item);
-
-  // Decrement the reference count for an |item|. Negative reference counts are
-  // not allowed.
-  void DecrementRefCount(uint32_t item);
-
-  // Clears the reference count for all items.
-  void ClearRefCounts();
-
-  // Calculates the delta of items that still have a positive reference count
-  // since last call to CommitRefCounts() and provides calculated delta in the
-  // output params |added_items| and |removed_items|. This method changes
-  // the internal state of the ReferenceTracker to be able to track what has
-  // in fact been committed to make it possible to find a delta.
-  void CommitRefCounts(std::vector<uint32_t>* added_items,
-                       std::vector<uint32_t>* removed_items);
-
- private:
-  // A reference count for all the given items. The key is the item, and the
-  // value is the count for that item.
-  std::unordered_map<uint32_t, int> active_ref_counts_;
-
-  // The full set of all committed items.
-  std::unordered_set<uint32_t> committed_;
-
-  DISALLOW_COPY_AND_ASSIGN(ReferenceTracker);
-};
-
-}  // namespace blimp
-
-#endif  // BLIMP_COMMON_COMPOSITOR_REFERENCE_TRACKER_H_