New media playback UI.

Source/core/css/CSSDefaultStyleSheets.cpp

Index: Source/core/css/CSSDefaultStyleSheets.cpp
diff --git a/Source/core/css/CSSDefaultStyleSheets.cpp b/Source/core/css/CSSDefaultStyleSheets.cpp
index 4b4f5aa698f294175ebb0a3f0c5905ade43e89f9..00676c20c59b10f7d562167ec844e1b2fe2035c6 100644
--- a/Source/core/css/CSSDefaultStyleSheets.cpp
+++ b/Source/core/css/CSSDefaultStyleSheets.cpp
@@ -156,7 +156,10 @@ void CSSDefaultStyleSheets::ensureDefaultStyleSheetsForElement(const Element& el
 
     // FIXME: We should assert that this sheet only contains rules for <video> and <audio>.
     if (!m_mediaControlsStyleSheet && (isHTMLVideoElement(element) || isHTMLAudioElement(element))) {
-        String mediaRules = loadResourceAsASCIIString("mediaControls.css") + LayoutTheme::theme().extraMediaControlsStyleSheet();
+        String mediaRules = loadResourceAsASCIIString(
+            RuntimeEnabledFeatures::newMediaPlaybackUiEnabled() ?
+            "mediaControlsNew.css" : "mediaControls.css") +
+            LayoutTheme::theme().extraMediaControlsStyleSheet();
         m_mediaControlsStyleSheet = parseUASheet(mediaRules);
         m_defaultStyle->addRulesFromSheet(mediaControlsStyleSheet(), screenEval());
         m_defaultPrintStyle->addRulesFromSheet(mediaControlsStyleSheet(), printEval());