[Experimental] Fool around with exposing extension bindings via blink

third_party/WebKit/Source/modules/extensions/WindowChrome.cpp

+// Copyright 2016 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 "modules/extensions/WindowChrome.h"
+
+#include "core/frame/LocalDOMWindow.h"
+#include "core/frame/LocalFrame.h"
+#include "modules/extensions/Chrome.h"
+
+namespace blink {
+
+WindowChrome::WindowChrome(LocalDOMWindow& window)
+    : DOMWindowProperty(window.frame())
+{
+}
+
+const char* WindowChrome::supplementName()
+{
+    return "WindowChrome";
+}
+
+// static
+WindowChrome& WindowChrome::from(LocalDOMWindow& window)
+{
+    WindowChrome* supplement = static_cast<WindowChrome*>(Supplement<LocalDOMWindow>::from(window, supplementName()));
+    if (!supplement) {
+        supplement = new WindowChrome(window);
+        provideTo(window, supplementName(), supplement);
+    }
+    return *supplement;
+}
+
+// static
+Chrome* WindowChrome::chromex(DOMWindow& window)
+{
+    return from(toLocalDOMWindow(window)).chromex();
+}
+
+Chrome* WindowChrome::chromex() const
+{
+    if (!m_chrome && frame())
+        m_chrome = Chrome::create(frame());
+    return m_chrome.get();
+}
+
+DEFINE_TRACE(WindowChrome)
+{
+    visitor->trace(m_chrome);
+    Supplement<LocalDOMWindow>::trace(visitor);
+    DOMWindowProperty::trace(visitor);
+}
+
+} // namespace blink