Adds IDBKeyPath parser / extractor, and provides a mechanism to call it sandboxed.

webkit/glue/idb_bindings.h

Index: webkit/glue/idb_bindings.h
diff --git a/webkit/glue/idb_bindings.h b/webkit/glue/idb_bindings.h
new file mode 100644
index 0000000000000000000000000000000000000000..074595dc9aa7b7adc544d34b2cd9cc135f336fac
--- /dev/null
+++ b/webkit/glue/idb_bindings.h
@@ -0,0 +1,25 @@
+// Copyright (c) 2010 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.
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/string16.h"
+
+namespace WebKit {
+class WebIDBKey;
+class WebSerializedScriptValue;
+}
+
+namespace webkit_glue {
+
+// Warning: this method holds a V8 lock, it should only be called within a
+// sandbox.
+bool IDBKeysFromValuesAndKeyPath(
+    const std::vector<WebKit::WebSerializedScriptValue>&
+        serialized_script_values,
+    const string16& idb_key_path,
+    std::vector<WebKit::WebIDBKey>* values);
+
+}  // namespace webkit_glue