Implement media cast buttons

Source/platform/ThemeTypes.h

 /*
  * Copyright (C) 2008, 2009, 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 32 matching lines @@
 
 typedef unsigned ControlStates;
 
 // Must follow CSSValueKeywords.in order
 enum ControlPart {
     NoControlPart, CheckboxPart, RadioPart, PushButtonPart, SquareButtonPart, ButtonPart,
     ButtonBevelPart, InnerSpinButtonPart, ListboxPart, ListItemPart,
     MediaEnterFullscreenButtonPart, MediaExitFullscreenButtonPart, MediaFullScreenVolumeSliderPart, MediaFullScreenVolumeSliderThumbPart, MediaMuteButtonPart, MediaPlayButtonPart,
     MediaOverlayPlayButtonPart, MediaToggleClosedCaptionsButtonPart,
     MediaSliderPart, MediaSliderThumbPart, MediaVolumeSliderContainerPart, MediaVolumeSliderPart, MediaVolumeSliderThumbPart,
-    MediaControlsBackgroundPart, MediaControlsFullscreenBackgroundPart, MediaCurrentTimePart, MediaTimeRemainingPart,
+    MediaControlsBackgroundPart, MediaControlsFullscreenBackgroundPart, MediaCurrentTimePart, MediaTimeRemainingPart, MediaCastOffButtonPart, MediaOverlayCastOffButtonPart,
     MenulistPart, MenulistButtonPart, MenulistTextPart, MenulistTextFieldPart, MeterPart, ProgressBarPart, ProgressBarValuePart,
     SliderHorizontalPart, SliderVerticalPart, SliderThumbHorizontalPart,
     SliderThumbVerticalPart, CaretPart, SearchFieldPart, SearchFieldDecorationPart,
     SearchFieldResultsDecorationPart,
     SearchFieldCancelButtonPart, TextFieldPart,
     RelevancyLevelIndicatorPart, ContinuousCapacityLevelIndicatorPart, DiscreteCapacityLevelIndicatorPart, RatingLevelIndicatorPart,
     TextAreaPart, CapsLockIndicatorPart
 };
 
 enum SelectionPart {
     SelectionBackground, SelectionForeground
 };
 
 enum ThemeFont {
     CaptionFont, IconFont, MenuFont, MessageBoxFont, SmallCaptionFont, StatusBarFont, MiniControlFont, SmallControlFont, ControlFont
 };
 
 enum ThemeColor {
     ActiveBorderColor, ActiveCaptionColor, AppWorkspaceColor, BackgroundColor, ButtonFaceColor, ButtonHighlightColor, ButtonShadowColor,
     ButtonTextColor, CaptionTextColor, GrayTextColor, HighlightColor, HighlightTextColor, InactiveBorderColor, InactiveCaptionColor,
     InactiveCaptionTextColor, InfoBackgroundColor, InfoTextColor, MatchColor, MenuTextColor, ScrollbarColor, ThreeDDarkDhasowColor,
     ThreeDFaceColor, ThreeDHighlightColor, ThreeDLightShadowColor, ThreeDShadowCLor, WindowColor, WindowFrameColor, WindowTextColor,
     FocusRingColor, ActiveListBoxSelection, ActiveListBoxSelectionText, InactiveListBoxSelection, InactiveListBoxSelectionText
 };
 
 }
 #endif