1 files changed, 37 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/web/OpenedFrameTracker.h b/chromium/third_party/WebKit/Source/web/OpenedFrameTracker.h
new file mode 100644
index 00000000000..d17e0f73bb3
--- /dev/null
+++ b/chromium/third_party/WebKit/Source/web/OpenedFrameTracker.h
@@ -0,0 +1,37 @@
+// Copyright 2014 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 OpenedFrameTracker_h
+#define OpenedFrameTracker_h
+
+#include "wtf/HashSet.h"
+#include "wtf/Noncopyable.h"
+
+namespace blink {
+
+class WebFrame;
+
+// Small helper class to track the set of frames that a WebFrame has opened.
+// Due to layering restrictions, we need to hide the implementation, since
+// public/web/ cannot depend on wtf/.
+class OpenedFrameTracker {
+    WTF_MAKE_NONCOPYABLE(OpenedFrameTracker);
+public:
+    OpenedFrameTracker();
+    ~OpenedFrameTracker();
+
+    bool isEmpty() const;
+    void add(WebFrame*);
+    void remove(WebFrame*);
+
+    // Updates the opener for all tracked frames.
+    void updateOpener(WebFrame*);
+
+private:
+    WTF::HashSet<WebFrame*> m_openedFrames;
+};
+
+} // namespace blink
+
+#endif // WebFramePrivate_h