Implement media cast buttons

Source/core/rendering/RenderThemeChromiumSkia.cpp

Index: Source/core/rendering/RenderThemeChromiumSkia.cpp
diff --git a/Source/core/rendering/RenderThemeChromiumSkia.cpp b/Source/core/rendering/RenderThemeChromiumSkia.cpp
index 1ad61a6d3849942cd849cf51e1a95b6302fc363e..a9b5f511b287992f63adc7277964210fe930099d 100644
--- a/Source/core/rendering/RenderThemeChromiumSkia.cpp
+++ b/Source/core/rendering/RenderThemeChromiumSkia.cpp
@@ -315,7 +315,14 @@ bool RenderThemeChromiumSkia::paintMediaToggleClosedCaptionsButton(RenderObject*
 {
     return RenderMediaControls::paintMediaControlsPart(MediaShowClosedCaptionsButton, o, paintInfo, r);
 }
-
+bool RenderThemeChromiumSkia::paintMediaCastButton(RenderObject* o, const PaintInfo& paintInfo, const IntRect& r)
+{
+    return RenderMediaControls::paintMediaControlsPart(MediaCastOffButton, o, paintInfo, r);
+}
+bool RenderThemeChromiumSkia::paintMediaOverlayCastButton(RenderObject* o, const PaintInfo& paintInfo, const IntRect& r)
+{
+    return RenderMediaControls::paintMediaControlsPart(MediaOverlayCastOffButton, o, paintInfo, r);
+}
 bool RenderThemeChromiumSkia::paintMediaVolumeSliderThumb(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     return RenderMediaControls::paintMediaControlsPart(MediaVolumeSliderThumb, object, paintInfo, rect);