Fix SVGDocument return title that is not a child of the root element

third_party/WebKit/Source/core/svg/SVGTitleElement.h

Index: third_party/WebKit/Source/core/svg/SVGTitleElement.h
diff --git a/third_party/WebKit/Source/core/svg/SVGTitleElement.h b/third_party/WebKit/Source/core/svg/SVGTitleElement.h
index 31e97532f5ea6ef5e671a13b70abede658e46c36..1adc590e486a673c13888393fd08845ca43d2548 100644
--- a/third_party/WebKit/Source/core/svg/SVGTitleElement.h
+++ b/third_party/WebKit/Source/core/svg/SVGTitleElement.h
@@ -30,6 +30,8 @@ class SVGTitleElement final : public SVGElement {
 public:
     DECLARE_NODE_FACTORY(SVGTitleElement);
 
+    void setText(const String&);
+
 private:
     explicit SVGTitleElement(Document&);
 
@@ -38,6 +40,8 @@ private:
     void childrenChanged(const ChildrenChange&) override;
 
     bool layoutObjectIsNeeded(const ComputedStyle&) override { return false; }
+
+    bool m_ignoreTitleUpdatesWhenChildrenChange;
 };
 
 } // namespace blink