Added Dartium changes onto 45.0.2454.104

Source/bindings/core/dart/DartEventListener.h

Index: Source/bindings/core/dart/DartEventListener.h
diff --git a/Source/bindings/core/dart/DartEventListener.h b/Source/bindings/core/dart/DartEventListener.h
new file mode 100644
index 0000000000000000000000000000000000000000..4535b20b7fe5f5f5bb9692360dafade1bb98b569
--- /dev/null
+++ b/Source/bindings/core/dart/DartEventListener.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2011 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
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * 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.
+ */
+
+#ifndef DartEventListener_h
+#define DartEventListener_h
+
+#include "core/events/EventListener.h"
+
+#include <dart_api.h>
+
+namespace blink {
+
+class Event;
+
+// Unfortunately we cannot add it to EventListener::Type enum, so keep
+// it here.
+enum {
+    DartEventListenerType = -1
+};
+
+class DartEventListener : public EventListener {
+public:
+    virtual ~DartEventListener();
+
+    // Implementation of EventListener interface.
+
+    virtual bool operator==(const EventListener& other) { return this == &other; }
+
+    virtual void handleEvent(ExecutionContext*, Event*);
+
+    virtual bool isLazy() const { return false; }
+
+    Dart_Isolate isolate() { return m_isolate; }
+    Dart_WeakPersistentHandle listenerObject() { return m_listener; }
+
+    static EventListener* toNative(Dart_Handle handle, Dart_Handle& exception);
+    static EventListener* toNative(Dart_NativeArguments args, int idx, Dart_Handle& exception)
+    {
+        Dart_Handle object = Dart_GetNativeArgument(args, idx);
+        return toNative(object, exception);
+    }
+
+    static EventListener* create(Dart_NativeArguments args, int idx, Dart_Handle& exception)
+    {
+        return toNative(args, idx, exception);
+    }
+
+    static EventListener* createWithNullCheck(Dart_NativeArguments args, int idx, Dart_Handle& exception)
+    {
+        Dart_Handle object = Dart_GetNativeArgument(args, idx);
+        return Dart_IsNull(object) ? 0 : toNative(object, exception);
+    }
+
+private:
+    DartEventListener();
+
+    static DartEventListener* createOrFetch(Dart_Handle listener);
+    Dart_Handle callListenerFunction(ExecutionContext*, Dart_Handle listener, Dart_Handle dartEvent);
+
+    static void weakCallback(void* isolateCallbackData, Dart_WeakPersistentHandle, void* peer);
+
+    Dart_Isolate m_isolate;
+    Dart_WeakPersistentHandle m_listener;
+    // FIXME: investigate why m_worldContext is needed in v8, extensions?
+};
+
+}
+
+#endif // DartEventListener_h