Remove all //blimp code.

blimp/common/compositor/reference_tracker.cc

-// 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.
-
-#include "blimp/common/compositor/reference_tracker.h"
-
-#include <stdint.h>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-#include "base/logging.h"
-
-namespace blimp {
-
-ReferenceTracker::ReferenceTracker() {}
-
-ReferenceTracker::~ReferenceTracker() {}
-
-void ReferenceTracker::IncrementRefCount(uint32_t item) {
-  ++active_ref_counts_[item];
-}
-
-void ReferenceTracker::DecrementRefCount(uint32_t item) {
-  DCHECK_GT(active_ref_counts_[item], 0);
-  --active_ref_counts_[item];
-}
-
-void ReferenceTracker::ClearRefCounts() {
-  for (auto it = active_ref_counts_.begin(); it != active_ref_counts_.end();
-       ++it) {
-    it->second = 0;
-  }
-}
-
-void ReferenceTracker::CommitRefCounts(std::vector<uint32_t>* added_entries,
-                                       std::vector<uint32_t>* removed_entries) {
-  DCHECK(added_entries);
-  DCHECK(removed_entries);
-  for (auto it = active_ref_counts_.begin(); it != active_ref_counts_.end();) {
-    uint32_t key = it->first;
-    uint32_t ref_count = it->second;
-    bool is_committed = committed_.count(key) > 0u;
-    if (ref_count > 0u) {
-      if (!is_committed) {
-        // The entry is new and has a positive reference count, so needs commit.
-        committed_.insert(key);
-        added_entries->push_back(key);
-      }
-      ++it;
-    } else {
-      if (is_committed) {
-        // The entry has already been committed, but is not reference anymore.
-        committed_.erase(key);
-        removed_entries->push_back(key);
-      }
-      // The entry has no references, so should not be staged anymore.
-      it = active_ref_counts_.erase(it);
-    }
-  }
-}
-
-}  // namespace blimp