Merge 96554 - A little more WebSQLDatabase thread safety.

Source/WebCore/storage/chromium/DatabaseTrackerChromium.cpp

Index: Source/WebCore/storage/chromium/DatabaseTrackerChromium.cpp
===================================================================
--- Source/WebCore/storage/chromium/DatabaseTrackerChromium.cpp	(revision 96741)
+++ Source/WebCore/storage/chromium/DatabaseTrackerChromium.cpp	(working copy)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010 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
@@ -47,7 +47,7 @@
 
 DatabaseTracker& DatabaseTracker::tracker()
 {
-    DEFINE_STATIC_LOCAL(DatabaseTracker, tracker, (""));
+    AtomicallyInitializedStatic(DatabaseTracker&, tracker = *new DatabaseTracker(""));
     return tracker;
 }