Promote RenderLayers that have a transition on opacity, transform, or filter

Source/WebKit/chromium/src/WebSettingsImpl.cpp

Index: Source/WebKit/chromium/src/WebSettingsImpl.cpp
diff --git a/Source/WebKit/chromium/src/WebSettingsImpl.cpp b/Source/WebKit/chromium/src/WebSettingsImpl.cpp
index 846c92e44421ba5f1fb9c68885d246534ddce22a..47f098909f970c2ef73cf223bf6c3429fd1a435c 100644
--- a/Source/WebKit/chromium/src/WebSettingsImpl.cpp
+++ b/Source/WebKit/chromium/src/WebSettingsImpl.cpp
@@ -507,6 +507,11 @@ void WebSettingsImpl::setAcceleratedCompositingForFixedPositionEnabled(bool enab
     m_settings->setAcceleratedCompositingForFixedPositionEnabled(enabled);
 }
 
+void WebSettingsImpl::setAcceleratedCompositingForTransitionEnabled(bool enabled)
+{
+    m_settings->setAcceleratedCompositingForTransitionEnabled(enabled);
+}
+
 void WebSettingsImpl::setMinimumAccelerated2dCanvasSize(int numPixels)
 {
     m_settings->setMinimumAccelerated2dCanvasSize(numPixels);