IndexedDB: Limit the size of a leveldb write buffer to minimize disk space.

content/browser/indexed_db/leveldb/leveldb_database.cc

Index: content/browser/indexed_db/leveldb/leveldb_database.cc
diff --git a/content/browser/indexed_db/leveldb/leveldb_database.cc b/content/browser/indexed_db/leveldb/leveldb_database.cc
index 9dd215c9da233e71b530dd97128d2a792b6dd919..56f670283122a774128ca456a0bd0361d1685160 100644
--- a/content/browser/indexed_db/leveldb/leveldb_database.cc
+++ b/content/browser/indexed_db/leveldb/leveldb_database.cc
@@ -126,6 +126,8 @@ static leveldb::Status OpenDB(
   options.filter_policy = filter_policy->get();
   options.reuse_logs = leveldb_env::kDefaultLogReuseOptionValue;
   options.compression = leveldb::kSnappyCompression;
+  options.write_buffer_size =
+      leveldb_env::WriteBufferSize(base::SysInfo::AmountOfTotalDiskSpace(path));
 
   // For info about the troubles we've run into with this parameter, see:
   // https://code.google.com/p/chromium/issues/detail?id=227313#c11