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..6e806776505f95855ea8ec48bdd522d4de42060c 100644
--- a/Source/core/css/CSSDefaultStyleSheets.cpp
+++ b/Source/core/css/CSSDefaultStyleSheets.cpp
@@ -37,6 +37,7 @@
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLHtmlElement.h"
 #include "core/layout/LayoutTheme.h"
+#include "core/page/Page.h"
 #include "platform/PlatformResourceLoader.h"
 #include "wtf/LeakAnnotations.h"
 
@@ -156,7 +157,10 @@ 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());