Index: Tools/DumpRenderTree/chromium/TestRunner/src/WebPreferences.cpp
diff --git a/Tools/DumpRenderTree/chromium/TestRunner/src/WebPreferences.cpp b/Tools/DumpRenderTree/chromium/TestRunner/src/WebPreferences.cpp
index a68777379f81c0a73570dbb7686f68ba37596555..454b08c676b5d7d5bb38f6451d4e76cf268c06ed 100644
--- a/Tools/DumpRenderTree/chromium/TestRunner/src/WebPreferences.cpp
+++ b/Tools/DumpRenderTree/chromium/TestRunner/src/WebPreferences.cpp
@@ -117,6 +117,7 @@ void WebPreferences::reset()
acceleratedCompositingForVideoEnabled = false;
acceleratedCompositingForFixedPositionEnabled = false;
acceleratedCompositingForOverflowScrollEnabled = false;
+ acceleratedCompositingForFixedRootBackgroundEnabled = false;
acceleratedCompositingEnabled = false;
accelerated2dCanvasEnabled = false;
deferred2dCanvasEnabled = false;
@@ -185,6 +186,7 @@ void WebPreferences::applyTo(WebView* webView)
settings->setAcceleratedCompositingForVideoEnabled(acceleratedCompositingForVideoEnabled);
settings->setAcceleratedCompositingForFixedPositionEnabled(acceleratedCompositingForFixedPositionEnabled);
settings->setAcceleratedCompositingForOverflowScrollEnabled(acceleratedCompositingForOverflowScrollEnabled);
+ settings->setAcceleratedCompositingForFixedRootBackgroundEnabled(acceleratedCompositingForFixedRootBackgroundEnabled);
settings->setFixedPositionCreatesStackingContext(acceleratedCompositingForFixedPositionEnabled);
settings->setForceCompositingMode(forceCompositingMode);
settings->setThreadedHTMLParser(threadedHTMLParser);