Disk cache v3 ref2

net/disk_cache/v3/block_bitmaps.h

Index: net/disk_cache/v3/block_bitmaps.h
===================================================================
--- net/disk_cache/v3/block_bitmaps.h	(revision 232523)
+++ net/disk_cache/v3/block_bitmaps.h	(working copy)
@@ -8,9 +8,12 @@
 #define NET_DISK_CACHE_V3_BLOCK_BITMAPS_H_
 
 #include "base/files/file_path.h"
+#include "base/gtest_prod_util.h"
+#include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
 #include "net/disk_cache/addr.h"
 #include "net/disk_cache/block_files.h"
+#include "net/disk_cache/mapped_file.h"
 
 namespace disk_cache {
 
@@ -22,7 +25,7 @@
 // regions in those files used to store data.
 class NET_EXPORT_PRIVATE BlockBitmaps {
  public:
-  BlockBitmaps();
+  explicit BlockBitmaps(BackendImplV3* backend);
   ~BlockBitmaps();
 
   void Init(const BlockFilesBitmaps& bitmaps);
@@ -49,6 +52,9 @@
   // Returns the header number that stores a given address.
   int GetHeaderNumber(Addr address);
 
+  // Returns the number of entry blocks for the given file type.
+  int EmptyBlocksForType(int first_file);
+
   // Returns the appropriate header to use for a new block.
   int HeaderNumberForNewBlock(FileType block_type, int block_count);
 
@@ -56,6 +62,8 @@
   void GetFileStats(int index, int* used_count, int* load);
 
   BlockFilesBitmaps bitmaps_;
+  BackendImplV3* backend_;
+  int empty_counts_[kFirstAdditionalBlockFileV3];
 
   DISALLOW_COPY_AND_ASSIGN(BlockBitmaps);
 };