Disable clipping on root scroller's ancestors.

third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp

Index: third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
index c4c24032461ada027bba17ac2421a8889e643788..fccd8ad7cde22f8ab778c36db881d818df0a5a8c 100644
--- a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
@@ -117,7 +117,6 @@ GraphicsLayer::GraphicsLayer(GraphicsLayerClient* client)
     , m_contentsOpaque(false)
     , m_shouldFlattenTransform(true)
     , m_backfaceVisibility(true)
-    , m_masksToBounds(false)
     , m_drawsContent(false)
     , m_contentsVisible(true)
     , m_isRootForIsolatedGroup(false)
@@ -952,8 +951,7 @@ void GraphicsLayer::setRenderingContext(int context)
 
 void GraphicsLayer::setMasksToBounds(bool masksToBounds)
 {
-    m_masksToBounds = masksToBounds;
-    m_layer->layer()->setMasksToBounds(m_masksToBounds);
+    m_layer->layer()->setMasksToBounds(masksToBounds);
 }
 
 void GraphicsLayer::setDrawsContent(bool drawsContent)