[Courgette] Using LabelManager to reduce Courgette-apply peak RAM by 25%.

courgette/label_manager.h

 // Copyright 2015 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 COURGETTE_LABEL_MANAGER_H_
 #define COURGETTE_LABEL_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 62 matching lines @@
 
     // Tracker for index usage to ensure uniqueness of indexes.
     std::vector<bool> available_;
 
     DISALLOW_COPY_AND_ASSIGN(SimpleIndexAssigner);
   };
 
   LabelManager();
   ~LabelManager();
 
-  // Returns an exclusive upper bound for all existing indexes in |labels_map|.
-  // TODO(huangs): Remove once all callers are gone.
-  static int GetIndexBound(const RVAToLabel& labels_map);
-
   // Returns an exclusive upper bound for all assigned indexes in |labels|.
   static int GetLabelIndexBound(const LabelVector& labels);
 
   // Accessor to stored Label instances.
   const LabelVector& Labels() const { return labels_; }
 
   // Efficiently searches for a Label that targets |rva|. Returns the pointer to
   // the stored Label instance if found, or null otherwise. Non-const to support
   // implementations that allocate-on-read.
   Label* Find(RVA rva);
@@ skipping 22 matching lines @@
   // The main list of Label instances, sorted by the |rva_| member.
   LabelVector labels_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LabelManager);
 };
 
 }  // namespace courgette
 
 #endif  // COURGETTE_LABEL_MANAGER_H_