Added plumbing for the availablechange event from Blink to WebPresentationClient.

Source/modules/presentation/AvailableChangeEvent.cpp

Index: Source/modules/presentation/AvailableChangeEvent.cpp
diff --git a/Source/modules/presentation/AvailableChangeEvent.cpp b/Source/modules/presentation/AvailableChangeEvent.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..8fe660ee0b424b4f3cbfff1ac2a2038f276750b5
--- /dev/null
+++ b/Source/modules/presentation/AvailableChangeEvent.cpp
@@ -0,0 +1,40 @@
+// Copyright 2015 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 "config.h"
+#include "modules/presentation/AvailableChangeEvent.h"
+
+namespace blink {
+
+AvailableChangeEvent::~AvailableChangeEvent()
+{
+}
+
+AvailableChangeEvent::AvailableChangeEvent()
+    : m_available(false)
+{
+}
+
+AvailableChangeEvent::AvailableChangeEvent(const AtomicString& eventType, bool available)
+    : Event(eventType, false, false)
+    , m_available(available)
+{
+}
+
+AvailableChangeEvent::AvailableChangeEvent(const AtomicString& eventType, const AvailableChangeEventInit& initializer)
+    : Event(eventType, initializer)
+    , m_available(initializer.hasAvailable() ? initializer.available() : false)

[Peter Beverloo, 2015/01/07 14:29:08]

Please set the default value in AvailableChangeEventInit.idl rather than forcing
it here.

[whywhat, 2015/01/07 16:22:15]

Done.

+{
+}
+
+const AtomicString& AvailableChangeEvent::interfaceName() const
+{
+    return EventNames::AvailableChangeEvent;
+}
+
+} // namespace blink
+
+

[Peter Beverloo, 2015/01/07 14:29:08]

nit: excess newlines.

[whywhat, 2015/01/07 16:22:15]

Done.

+
+