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 b2e10ca97a2324f6e38b21943fae8c0b0b960b1e..da2ef13f1c77319172bc3936f362b9660ac3f40a 100644
--- a/Source/core/rendering/RenderThemeChromiumSkia.cpp
+++ b/Source/core/rendering/RenderThemeChromiumSkia.cpp
@@ -316,6 +316,11 @@ 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::paintMediaVolumeSliderThumb(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     return RenderMediaControls::paintMediaControlsPart(MediaVolumeSliderThumb, object, paintInfo, rect);