Bind Window focus ability to the ExecutionContext instead of the process.

Source/web/WebScopedWindowFocusAllowedIndicator.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "public/web/WebScopedWindowFocusAllowedIndicator.h"
 
+#include "core/dom/Document.h"
+#include "core/dom/ScopedWindowFocusAllowedIndicator.h"
 #include "core/page/WindowFocusAllowedIndicator.h"
+#include "public/web/WebDocument.h"
 
 namespace blink {
 
+void WebScopedWindowFocusAllowedIndicator::initialize(WebDocument* webDocument)
+{
+    Document* document = webDocument->unwrap<Document>();
+    ASSERT(document);
+    m_private.reset(new ScopedWindowFocusAllowedIndicator(document));
+}
+
 void WebScopedWindowFocusAllowedIndicator::initialize()
 {
     m_indicator.reset(new WindowFocusAllowedIndicator());
 }
 
 void WebScopedWindowFocusAllowedIndicator::reset()
 {
     m_indicator.reset(0);
+    m_private.reset(0);
 }
 
 } // namespace blink