Migrate the IndexedDB backend from Blink to Chromium

content/browser/indexed_db/webidbfactory_impl.h

 // 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_
+#ifndef CONTENT_BROWSER_INDEXED_DB_WEBIDBFACTORY_IMPL_H_
+#define CONTENT_BROWSER_INDEXED_DB_WEBIDBFACTORY_IMPL_H_
 
-#include "base/files/scoped_temp_dir.h"
-#include "base/threading/thread_local.h"
+#include "base/memory/ref_counted.h"
 #include "third_party/WebKit/Source/Platform/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 {
+namespace content {
+
+class IndexedDBFactory;
+
+class WebIDBFactoryImpl : public WebKit::WebIDBFactory {
  public:
-  TestWebIDBFactory();
-  virtual ~TestWebIDBFactory();
+  WebIDBFactoryImpl();
+  virtual ~WebIDBFactoryImpl();
 
-  // WebIDBFactory methods:
   virtual void getDatabaseNames(WebKit::WebIDBCallbacks*,
                                 const WebKit::WebString& database_identifier,
                                 const WebKit::WebString& data_dir);
   virtual void open(const WebKit::WebString& name,
                     long long version,
                     long long transaction_id,
                     WebKit::WebIDBCallbacks*,
                     WebKit::WebIDBDatabaseCallbacks*,
                     const WebKit::WebString& database_identifier,
                     const WebKit::WebString& data_dir);
   virtual void deleteDatabase(const WebKit::WebString& name,
                               WebKit::WebIDBCallbacks*,
                               const WebKit::WebString& database_identifier,
                               const WebKit::WebString& data_dir);
 
  private:
-  // Returns the WebIDBFactory implementation to use for the current thread.
-  WebKit::WebIDBFactory* GetFactory();
-
-  // Returns the data directory to use.
-  WebKit::WebString GetDataDir() const;
-
-  // 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_;
+  scoped_refptr<IndexedDBFactory> idb_factory_backend_;
 };
 
-#endif  // WEBKIT_SUPPORT_TEST_WEBIDBFACTORY_H_
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_WEBIDBFACTORY_IMPL_H_