Remove the acceleratedCompositingForCanvas setting.

Source/core/rendering/compositing/CompositingReasonFinder.cpp

Index: Source/core/rendering/compositing/CompositingReasonFinder.cpp
diff --git a/Source/core/rendering/compositing/CompositingReasonFinder.cpp b/Source/core/rendering/compositing/CompositingReasonFinder.cpp
index bae98d2cffcb571e10d78a1edd41acb6d01bb3bf..61451afd06f3e8c32ca10be225f5526102a0d41a 100644
--- a/Source/core/rendering/compositing/CompositingReasonFinder.cpp
+++ b/Source/core/rendering/compositing/CompositingReasonFinder.cpp
@@ -27,8 +27,6 @@ void CompositingReasonFinder::updateTriggers()
     m_compositingTriggers = 0;
 
     Settings& settings = m_renderView.document().page()->settings();
-    if (settings.acceleratedCompositingForCanvasEnabled())
-        m_compositingTriggers |= CanvasTrigger;
     if (settings.compositedScrollingForFramesEnabled())
         m_compositingTriggers |= ScrollableInnerFrameTrigger;
 
@@ -154,7 +152,7 @@ CompositingReasons CompositingReasonFinder::nonStyleDeterminedDirectReasons(cons
     if (requiresCompositingForPositionFixed(renderer))
         directReasons |= CompositingReasonPositionFixed;
 
-    directReasons |= renderer->additionalCompositingReasons(m_compositingTriggers);
+    directReasons |= renderer->additionalCompositingReasons();
 
     ASSERT(!(directReasons & CompositingReasonComboAllStyleDeterminedReasons));
     return directReasons;