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

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 212b970e674a87cd67e3accccba1cf56fefdac70..64f72e837e40d3a5cb3d7d72c4b4a0cc95adb60d 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -1286,29 +1286,18 @@
 void Document::setTitle(const String& title)
 {
     // Title set by JavaScript -- overrides any title elements.
-    if (!m_titleElement) {
-        if (isHTMLDocument() || isXHTMLDocument()) {
-            HTMLElement* headElement = head();
-            if (!headElement)
-                return;
-            m_titleElement = HTMLTitleElement::create(*this);
-            headElement->appendChild(m_titleElement.get());
-        } else if (isSVGDocument()) {
-            Element* element = documentElement();
-            if (!isSVGSVGElement(element))
-                return;
-            m_titleElement = SVGTitleElement::create(*this);
-            element->insertBefore(m_titleElement.get(), element->firstChild());
-        }
-    } else {
-        if (!isHTMLDocument() && !isXHTMLDocument() && !isSVGDocument())
-            m_titleElement = nullptr;
+    if (!isHTMLDocument() && !isXHTMLDocument()) {
+        m_titleElement = nullptr;
+    } else if (!m_titleElement) {
+        HTMLElement* headElement = head();
+        if (!headElement)
+            return;
+        m_titleElement = HTMLTitleElement::create(*this);
+        headElement->appendChild(m_titleElement.get());
     }
 
     if (isHTMLTitleElement(m_titleElement))
         toHTMLTitleElement(m_titleElement)->setText(title);
-    else if (isSVGTitleElement(m_titleElement))
-        toSVGTitleElement(m_titleElement)->setText(title);
     else
         updateTitle(title);
 }
@@ -1324,25 +1313,6 @@
         }
     } else {
         m_titleElement = titleElement;
-    }
-
-
-    if (isSVGDocument()) {
-        // If the root element that is <svg> element in the svg namespace is not the parent of <title> element,
-        // ignore <title> element.
-        if (isSVGSVGElement(documentElement()) && documentElement() != m_titleElement->parentNode()) {
-            m_titleElement = nullptr;
-            return;
-        }
-
-        // If the root element is not <svg> element in the svg namespace and <title> element is in the svg namespace,
-        // or the root element is <svg> element in the svg namespace and <title> element is not in the svg namespace,
-        // ignore <title> element.
-        if ((!isSVGSVGElement(m_titleElement->parentNode()) && isSVGTitleElement(m_titleElement))
-            || (isSVGSVGElement(m_titleElement->parentNode()) && !isSVGTitleElement(m_titleElement))) {
-            m_titleElement = nullptr;
-            return;
-        }
     }
 
     if (isHTMLTitleElement(m_titleElement))