Make TestWebIDBFactory allocate a separate WebIDBFactory per thread.

webkit/support/test_webidbfactory.h

Index: webkit/support/test_webidbfactory.h
===================================================================
--- webkit/support/test_webidbfactory.h	(revision 0)
+++ webkit/support/test_webidbfactory.h	(working copy)
@@ -0,0 +1,53 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBKIT_SUPPORT_TEST_WEBIDBFACTORY_H_
+#define WEBKIT_SUPPORT_TEST_WEBIDBFACTORY_H_
+
+#include "base/files/scoped_temp_dir.h"
+#include "base/threading/thread_local.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBFactory.h"
+
+// Wrap a WebKit::WebIDBFactory to rewrite the data directory to
+// a scoped temp directory. In multiprocess Chromium this is rewritten
+// to a real profile directory during IPC.
+class TestWebIDBFactory : public WebKit::WebIDBFactory {
+ public:
+  TestWebIDBFactory();
+  virtual ~TestWebIDBFactory();
+
+  // WebIDBFactory methods:
+  virtual void getDatabaseNames(WebKit::WebIDBCallbacks* callbacks,
+                                const WebKit::WebSecurityOrigin& origin,
+                                WebKit::WebFrame* frame,
+                                const WebKit::WebString& data_dir);
+  virtual void open(const WebKit::WebString& name,
+                    long long version,
+                    long long transaction_id,
+                    WebKit::WebIDBCallbacks* callbacks,
+                    WebKit::WebIDBDatabaseCallbacks* database_callbacks,
+                    const WebKit::WebSecurityOrigin& origin,
+                    WebKit::WebFrame* frame,
+                    const WebKit::WebString& data_dir);
+  virtual void deleteDatabase(const WebKit::WebString& name,
+                              WebKit::WebIDBCallbacks* callbacks,
+                              const WebKit::WebSecurityOrigin& origin,
+                              WebKit::WebFrame* frame,
+                              const WebKit::WebString& data_dir);
+
+ private:
+  // Returns the WebIDBFactory implementation to use for the current thread.
+  WebKit::WebIDBFactory* GetFactory();
+
+  // We allocate a separate WebIDBFactory instance per thread since the
+  // implementation is not thread-safe.  We also intentionally leak the
+  // factory instances to avoid shutdown races.  TODO(darin): Can we
+  // avoid leaking these?
+  base::ThreadLocalPointer<WebKit::WebIDBFactory> factories_;
+
+  base::ScopedTempDir indexed_db_dir_;
+  WebKit::WebString data_dir_;
+};
+
+#endif  // WEBKIT_SUPPORT_TEST_WEBIDBFACTORY_H_