Inhibit title update when removing children before setting new value

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index e68495cfdae1ef34b27368b76fa776b31ad27694..8d5f0db992b8e82af63ed2cf676322c847257798 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -1306,8 +1306,10 @@ void Document::setTitle(const String& title)
         }
     }
 
-    if (m_titleElement)
+    if (m_titleElement && m_titleElement->hasTagName(titleTag)) {
+        IgnoreTitleUpdatesWhenChildrenChange inhibitor(toHTMLTitleElement(m_titleElement));
         m_titleElement->removeChildren();
+    }
 
     updateTitle(title);