Merge 96554 - A little more WebSQLDatabase thread safety.

Source/WebCore/storage/chromium/QuotaTracker.cpp

Index: Source/WebCore/storage/chromium/QuotaTracker.cpp
===================================================================
--- Source/WebCore/storage/chromium/QuotaTracker.cpp	(revision 96741)
+++ Source/WebCore/storage/chromium/QuotaTracker.cpp	(working copy)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 Google Inc. All rights reserved.
+ * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -40,7 +40,7 @@
 
 QuotaTracker& QuotaTracker::instance()
 {
-    DEFINE_STATIC_LOCAL(QuotaTracker, tracker, ());
+    AtomicallyInitializedStatic(QuotaTracker&, tracker = *new QuotaTracker);
     return tracker;
 }