Merge 143512

Merge 143512
> IndexedDB: Limit LevelDB's max open files
> https://bugs.webkit.org/show_bug.cgi?id=109993
> 
> Reviewed by Tony Chang.
> 
> LevelDB keeps up to 1000 (by default) data files open at a time to
> avoid having to open() them. This has caused chromium to hit the
> process-wide open file limit. This patch changes max_open_files to 20,
> as that's the minimum permitted by LevelDB and we have no reason to
> think that performance will suffer because of the extra open calls.
> 
> No new tests - a chromium browser test that tracks the open LevelDB
> files is plausible but is blocked on http://crbug.com/177249/.
> 
> * platform/leveldb/LevelDBDatabase.cpp:
> (WebCore::openDB):
> 

TBR=dgrogan@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=143798

[dgrogan, 2013-02-22 22:17:41]

Committed patchset #1 manually as r143798.