Remove partial blockfile v3 disk_cache implementation.

net/disk_cache/blockfile/addr.h

 // Copyright (c) 2012 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.
 
 // This is an internal class that handles the address of a cache record.
 // See net/disk_cache/disk_cache.h for the public interface of the cache.
 
 #ifndef NET_DISK_CACHE_BLOCKFILE_ADDR_H_
 #define NET_DISK_CACHE_BLOCKFILE_ADDR_H_
 
@@ skipping 13 matching lines @@
   BLOCK_4K = 4,
   BLOCK_FILES = 5,
   BLOCK_ENTRIES = 6,
   BLOCK_EVICTED = 7
 };
 
 const int kMaxBlockSize = 4096 * 4;
 const int16_t kMaxBlockFile = 255;
 const int kMaxNumBlocks = 4;
 const int16_t kFirstAdditionalBlockFile = 4;
-const size_t kFirstAdditionalBlockFileV3 = 7;
 
 // Defines a storage address for a cache record
 //
 // Header:
 //   1000 0000 0000 0000 0000 0000 0000 0000 : initialized bit
 //   0111 0000 0000 0000 0000 0000 0000 0000 : file type
 //
 // File type values:
 //   0 = separate file on disk
 //   1 = rankings block file
@@ skipping 109 matching lines @@
     else
       return EXTERNAL;
   }
 
   static int RequiredBlocks(int size, FileType file_type) {
     int block_size = BlockSizeForFileType(file_type);
     return (size + block_size - 1) / block_size;
   }
 
   // Returns true if this address looks like a valid one.
-  bool SanityCheckV2() const;
-  bool SanityCheckV3() const;
-  bool SanityCheckForEntryV2() const;
-  bool SanityCheckForEntryV3() const;
+  bool SanityCheck() const;
+  bool SanityCheckForEntry() const;
   bool SanityCheckForRankings() const;
 
  private:
   uint32_t reserved_bits() const { return value_ & kReservedBitsMask; }
 
   static const uint32_t kInitializedMask = 0x80000000;
   static const uint32_t kFileTypeMask = 0x70000000;
   static const uint32_t kFileTypeOffset = 28;
   static const uint32_t kReservedBitsMask = 0x0c000000;
   static const uint32_t kNumBlocksMask = 0x03000000;
   static const uint32_t kNumBlocksOffset = 24;
   static const uint32_t kFileSelectorMask = 0x00ff0000;
   static const uint32_t kFileSelectorOffset = 16;
   static const uint32_t kStartBlockMask = 0x0000FFFF;
   static const uint32_t kFileNameMask = 0x0FFFFFFF;
 
   CacheAddr value_;
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_BLOCKFILE_ADDR_H_