Add Cache size to the Simple Index.

net/disk_cache/simple/simple_entry_impl.h

Index: net/disk_cache/simple/simple_entry_impl.h
diff --git a/net/disk_cache/simple/simple_entry_impl.h b/net/disk_cache/simple/simple_entry_impl.h
index 353ee4a82b6fd05ef5228a45c077c225d89a068f..a6426141e820e95136b1a7c1276365fca59efc05 100644
--- a/net/disk_cache/simple/simple_entry_impl.h
+++ b/net/disk_cache/simple/simple_entry_impl.h
@@ -99,6 +99,7 @@ class SimpleEntryImpl : public Entry {
   // operation, such as ReadData() or WriteData(). Calls |completion_callback|.
   // If |entry| no longer exists, then it ensures |sync_entry| is closed.
   static void EntryOperationComplete(
+      base::WeakPtr<SimpleIndex> index,

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

What's the right thing to do when an operation finishes after the simple index
has been deleted?

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

We do nothing, the index will be stale on disk.
What can we do ?

The next operation on that entry will update the entry data in the index or the
garbage collector will take care of refreshing the whole index.

       const CompletionCallback& completion_callback,
       base::WeakPtr<SimpleEntryImpl> entry,
       SimpleSynchronousEntry* sync_entry,