This CL clean up patch in SVGElements.

Source/core/svg/SVGElementRareData.cpp

Index: Source/core/svg/SVGElementRareData.cpp
diff --git a/Source/core/svg/SVGElementRareData.cpp b/Source/core/svg/SVGElementRareData.cpp
index 82c9c3c792e729113329384f8f86d2e17f02691e..5652eafa0c3fcae027618e25ab1fa99835b15bb8 100644
--- a/Source/core/svg/SVGElementRareData.cpp
+++ b/Source/core/svg/SVGElementRareData.cpp
@@ -24,7 +24,7 @@ ComputedStyle* SVGElementRareData::overrideComputedStyle(Element* element, const
 {
     ASSERT(element);
     if (!m_useOverrideComputedStyle)
-        return 0;
+        return nullptr;
     if (!m_overrideComputedStyle || m_needsOverrideComputedStyleUpdate) {
         // The style computed here contains no CSS Animations/Transitions or SMIL induced rules - this is needed to compute the "base value" for the SMIL animation sandwhich model.
         m_overrideComputedStyle = element->document().ensureStyleResolver().styleForElement(element, parentStyle, DisallowStyleSharing, MatchAllRulesExcludingSMIL);