Media Controls: delegate 'volumechange' and 'focusin' handling to an EventListener.

third_party/WebKit/Source/core/html/shadow/MediaControlsMediaEventListener.cpp

Index: third_party/WebKit/Source/core/html/shadow/MediaControlsMediaEventListener.cpp
diff --git a/third_party/WebKit/Source/core/html/shadow/MediaControlsMediaEventListener.cpp b/third_party/WebKit/Source/core/html/shadow/MediaControlsMediaEventListener.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c607fce4e0be6578d1af1dad39884f906e9f7617
--- /dev/null
+++ b/third_party/WebKit/Source/core/html/shadow/MediaControlsMediaEventListener.cpp
@@ -0,0 +1,48 @@
+// 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 "core/html/shadow/MediaControlsMediaEventListener.h"
+
+#include "core/events/Event.h"
+#include "core/html/HTMLMediaElement.h"
+#include "core/html/shadow/MediaControls.h"
+
+namespace blink {
+
+MediaControlsMediaEventListener::MediaControlsMediaEventListener(
+    MediaControls* mediaControls)
+    : EventListener(CPPEventListenerType), m_mediaControls(mediaControls) {
+  m_mediaControls->m_mediaElement->addEventListener(
+      EventTypeNames::volumechange, this, false);
+  m_mediaControls->m_mediaElement->addEventListener(EventTypeNames::focusin,
+                                                    this, false);
+}
+
+bool MediaControlsMediaEventListener::operator==(
+    const EventListener& other) const {
+  return this == &other;
+}
+
+void MediaControlsMediaEventListener::handleEvent(
+    ExecutionContext* executionContext,
+    Event* event) {
+  if (event->type() == EventTypeNames::volumechange) {
+    m_mediaControls->onVolumeChange();
+    return;
+  }
+
+  if (event->type() == EventTypeNames::focusin) {
+    m_mediaControls->onFocusIn();
+    return;
+  }
+
+  NOTREACHED();
+}
+
+DEFINE_TRACE(MediaControlsMediaEventListener) {
+  EventListener::trace(visitor);
+  visitor->trace(m_mediaControls);
+}
+
+}  // namespace blink