Reset m_didTransformToRootUpdate flag during invalidationTreeIfNeeded

Source/core/rendering/svg/RenderSVGTransformableContainer.h

Index: Source/core/rendering/svg/RenderSVGTransformableContainer.h
diff --git a/Source/core/rendering/svg/RenderSVGTransformableContainer.h b/Source/core/rendering/svg/RenderSVGTransformableContainer.h
index 1103a3b38855a09218788056ebe2450d4350b2cb..f113af5af90622741cef5456d8956ad8f3b96183 100644
--- a/Source/core/rendering/svg/RenderSVGTransformableContainer.h
+++ b/Source/core/rendering/svg/RenderSVGTransformableContainer.h
@@ -35,12 +35,17 @@ public:
     virtual bool isSVGTransformableContainer() const OVERRIDE { return true; }
     virtual const AffineTransform& localToParentTransform() const OVERRIDE { return m_localTransform; }
     virtual void setNeedsTransformUpdate() OVERRIDE { m_needsTransformUpdate = true; }
-    virtual bool didTransformToRootUpdate() OVERRIDE { return m_didTransformToRootUpdate; }
+    virtual bool didTransformToRootUpdate() const OVERRIDE { return m_didTransformToRootUpdate; }
 
 private:
     virtual bool calculateLocalTransform() OVERRIDE;
     virtual AffineTransform localTransform() const OVERRIDE { return m_localTransform; }
 
+    virtual void clearPaintInvalidationState() OVERRIDE;
+#if ENABLE(ASSERT)
+    virtual bool paintInvalidationStateIsDirty() const OVERRIDE  { return RenderSVGContainer::paintInvalidationStateIsDirty() || m_didTransformToRootUpdate; }
+#endif
+
     bool m_needsTransformUpdate : 1;
     bool m_didTransformToRootUpdate : 1;
     AffineTransform m_localTransform;