Avoid leaking TestWebIDBFactory instances, and reset

webkit/support/test_webkit_platform_support.h

Index: webkit/support/test_webkit_platform_support.h
===================================================================
--- webkit/support/test_webkit_platform_support.h	(revision 179816)
+++ webkit/support/test_webkit_platform_support.h	(working copy)
@@ -137,6 +137,8 @@
       const WebKit::WebFloatPoint& velocity,
       const WebKit::WebSize& cumulative_scroll);
 
+  void ResetIDBFactory();
+
  private:
   TestShellWebMimeRegistryImpl mime_registry_;
   MockWebClipboardImpl mock_clipboard_;
@@ -154,6 +156,7 @@
   WebKit::WebGamepads gamepad_data_;
   WebKit::Platform* shadow_platform_delegate_;
   HyphenDict* hyphen_dictionary_;
+  scoped_ptr<WebKit::WebIDBFactory> idb_factory_;
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
   WebKit::WebThemeEngine* active_theme_engine_;