Update widget geometries when transforming a layer

third_party/WebKit/Source/core/paint/PaintLayer.cpp

Index: third_party/WebKit/Source/core/paint/PaintLayer.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.cpp b/third_party/WebKit/Source/core/paint/PaintLayer.cpp
index 25a704b56969c89dc4eeefb4a840f081c2c18e94..8f5f919625c83106d2ddea999ab4f88a984fc9c5 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.cpp
@@ -420,6 +420,9 @@ void PaintLayer::updateTransform(const ComputedStyle* oldStyle, const ComputedSt
 
     if (had3DTransform != has3DTransform())
         dirty3DTransformedDescendantStatus();
+
+    if (FrameView* frameView = layoutObject()->document().view())
+        frameView->setNeedsUpdateWidgetGeometries();
 }
 
 static PaintLayer* enclosingLayerForContainingBlock(PaintLayer* layer)