Implementation of 2D canvas context lost/restored events

Source/core/html/canvas/Canvas2DContextAttributes.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
  * copyright notice, this list of conditions and the following disclaimer
@@ skipping 10 matching lines @@
  * 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 "Canvas2DContextAttributes.h"
 
+#include "wtf/text/WTFString.h"
+
 namespace WebCore {
 
 Canvas2DContextAttributes::Canvas2DContextAttributes()
     : m_alpha(true)
+    , m_storage(PersistentStorage)
 {
     ScriptWrappable::init(this);
 }
 
 Canvas2DContextAttributes::~Canvas2DContextAttributes()
 {
 }
 
 PassRefPtr<Canvas2DContextAttributes> Canvas2DContextAttributes::create()
 {
     return adoptRef(new Canvas2DContextAttributes());
 }
 
 bool Canvas2DContextAttributes::alpha() const
 {
     return m_alpha;
 }
 
 void Canvas2DContextAttributes::setAlpha(bool alpha)
 {
     m_alpha = alpha;
 }
 
+String Canvas2DContextAttributes::storage() const
+{
+    return m_storage == PersistentStorage ? "persistent" : "discardable";
+}
+
+void Canvas2DContextAttributes::setStorage(const String& storage)
+{
+    if (storage == "persistent")
+        m_storage = PersistentStorage;
+    else if (storage == "discardable")
+        m_storage = DiscardableStorage;
+}
+
+Canvas2DContextStorage Canvas2DContextAttributes::parsedStorage() const
+{
+    return m_storage;
+}
+
 } // namespace WebCore