Add Cache size to the Simple Index.

net/disk_cache/simple/simple_index.h

Index: net/disk_cache/simple/simple_index.h
diff --git a/net/disk_cache/simple/simple_index.h b/net/disk_cache/simple/simple_index.h
index 867e051d4f28e63ba4b7fc43632dbd998eba6506..f07476d2409d41988bbeba0dd91b1bc27f540ec6 100644
--- a/net/disk_cache/simple/simple_index.h
+++ b/net/disk_cache/simple/simple_index.h
@@ -47,6 +47,8 @@ class SimpleIndex
 
   void Cleanup();

[gavinp, 2013/04/10 10:33:23]

While we're here, can we comment this method? I forgot what it did while I was
reading this review. :/

[felipeg, 2013/04/10 11:45:35]

I changed its name in the other CL

 
+  bool UpdateEntrySize(const std::string& key, uint64 entry_size);

[gavinp, 2013/04/10 10:33:23]

I think this deserves a short comment describing what it does. 

[felipeg, 2013/04/10 11:45:35]

Done.

+
  private:
   // TODO(felipeg): This way we are storing the hash_key string twice (as the
   // hash_map::key and as a member of EntryMetadata. We could save space if we
@@ -73,6 +75,7 @@ class SimpleIndex
   const base::FilePath path_;
 
   EntrySet entries_set_;
+  uint64 cache_size_;  // Total cache storage size in bytes.
 
   base::FilePath index_filename_;
   base::PlatformFile index_file_;