Made IndexedDB's comparators public.

content/browser/indexed_db/indexed_db_backing_store.h

 // Copyright (c) 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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_BACKING_STORE_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_BACKING_STORE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/strings/string_piece.h"
 #include "base/timer/timer.h"
 #include "content/browser/indexed_db/indexed_db.h"
 #include "content/browser/indexed_db/indexed_db_metadata.h"
 #include "content/browser/indexed_db/leveldb/leveldb_iterator.h"
 #include "content/browser/indexed_db/leveldb/leveldb_transaction.h"
 #include "content/common/content_export.h"
 #include "content/common/indexed_db/indexed_db_key.h"
 #include "content/common/indexed_db/indexed_db_key_path.h"
 #include "content/common/indexed_db/indexed_db_key_range.h"
 #include "third_party/leveldatabase/src/include/leveldb/status.h"
@@ skipping 13 matching lines @@
                                       scoped_ptr<LevelDBDatabase>* db,
                                       bool* is_disk_full) = 0;
   virtual leveldb::Status DestroyLevelDB(const base::FilePath& file_name) = 0;
 };
 
 class CONTENT_EXPORT IndexedDBBackingStore
     : public base::RefCounted<IndexedDBBackingStore> {
  public:
   class CONTENT_EXPORT Transaction;
 
+  class Comparator : public LevelDBComparator {
+   public:
+    virtual int Compare(const base::StringPiece& a,
+                        const base::StringPiece& b) const OVERRIDE;
+    virtual const char* Name() const OVERRIDE;
+  };
+
   const GURL& origin_url() const { return origin_url_; }
   base::OneShotTimer<IndexedDBBackingStore>* close_timer() {
     return &close_timer_;
   }
 
   static scoped_refptr<IndexedDBBackingStore> Open(
       const GURL& origin_url,
       const base::FilePath& path_base,
       blink::WebIDBDataLoss* data_loss,
       std::string* data_loss_message,
@@ skipping 284 matching lines @@
   const std::string origin_identifier_;
 
   scoped_ptr<LevelDBDatabase> db_;
   scoped_ptr<LevelDBComparator> comparator_;
   base::OneShotTimer<IndexedDBBackingStore> close_timer_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_BACKING_STORE_H_