Make TestWebIDBFactory allocate a separate WebIDBFactory per thread.

webkit/support/test_webkit_platform_support.h

Index: webkit/support/test_webkit_platform_support.h
diff --git a/webkit/support/test_webkit_platform_support.h b/webkit/support/test_webkit_platform_support.h
index ac824f2457a3da2c7853573a823e7b7e2806a997..049b19a5ee6dd3c88e800ec03bdf7d8a15bdb2d9 100644
--- a/webkit/support/test_webkit_platform_support.h
+++ b/webkit/support/test_webkit_platform_support.h
@@ -8,7 +8,6 @@
 #include "base/compiler_specific.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGamepads.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBFactory.h"
 #include "webkit/glue/webfileutilities_impl.h"
 #include "webkit/glue/webkitplatformsupport_impl.h"
 #include "webkit/support/simple_database_system.h"
@@ -83,8 +82,6 @@ class TestWebKitPlatformSupport :
   virtual WebKit::WebStorageNamespace* createLocalStorageNamespace(
       const WebKit::WebString& path, unsigned quota);
 
-  virtual WebKit::WebIDBFactory* idbFactory();
-
 #if defined(OS_WIN) || defined(OS_MACOSX)
   void SetThemeEngine(WebKit::WebThemeEngine* engine);
   virtual WebKit::WebThemeEngine *themeEngine();