Get IPC working for Indexed DB in shared workers.

content/worker/worker_webkitplatformsupport_impl.cc

Index: content/worker/worker_webkitplatformsupport_impl.cc
diff --git a/content/worker/worker_webkitplatformsupport_impl.cc b/content/worker/worker_webkitplatformsupport_impl.cc
index d37621a600c2ee529fa4565f7afc3c2129a73683..e5e17b84d3f687c0efcbb9aed1d790e9fd82ca61 100644
--- a/content/worker/worker_webkitplatformsupport_impl.cc
+++ b/content/worker/worker_webkitplatformsupport_impl.cc
@@ -12,6 +12,7 @@
 #include "content/common/mime_registry_messages.h"
 #include "content/common/webblobregistry_impl.h"
 #include "content/common/webmessageportchannel_impl.h"
+#include "content/renderer/indexed_db/renderer_webidbfactory_impl.h"
 #include "content/worker/worker_thread.h"
 #include "ipc/ipc_sync_message_filter.h"
 #include "net/base/mime_util.h"
@@ -208,6 +209,13 @@ long long WorkerWebKitPlatformSupportImpl::databaseGetSpaceAvailableForOrigin(
   return DatabaseUtil::DatabaseGetSpaceAvailable(origin_identifier);
 }
 
+WebKit::WebIDBFactory* WorkerWebKitPlatformSupportImpl::idbFactory() {
+  if (!web_idb_factory_.get()) {
+    web_idb_factory_.reset(new RendererWebIDBFactoryImpl());
+  }
+  return web_idb_factory_.get();
+}
+
 WebMimeRegistry::SupportsType
 WorkerWebKitPlatformSupportImpl::supportsMIMEType(
     const WebString&) {