Inhibit title update when removing children before setting new value

Source/core/html/HTMLTitleElement.h

Index: Source/core/html/HTMLTitleElement.h
diff --git a/Source/core/html/HTMLTitleElement.h b/Source/core/html/HTMLTitleElement.h
index fcdcf6a2c81e150bf455f8a46bbc027b3738a39e..ba70c31e9207b9f988daa341827b4dd751c745b7 100644
--- a/Source/core/html/HTMLTitleElement.h
+++ b/Source/core/html/HTMLTitleElement.h
@@ -26,6 +26,8 @@
 
 namespace WebCore {
 
+using namespace HTMLNames;
+
 class HTMLTitleElement FINAL : public HTMLElement {
 public:
     static PassRefPtr<HTMLTitleElement> create(Document&);
@@ -34,15 +36,32 @@ public:
     void setText(const String&);
 
 private:
+    friend class IgnoreTitleUpdatesWhenChildrenChange;
     explicit HTMLTitleElement(Document&);
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);
+
+    bool m_ignoreTitleUpdatesWhenChildrenChange;
 };
 
 DEFINE_NODE_TYPE_CASTS(HTMLTitleElement, hasTagName(HTMLNames::titleTag));
 
+class IgnoreTitleUpdatesWhenChildrenChange {
+public:
+    IgnoreTitleUpdatesWhenChildrenChange(PassRefPtr<HTMLTitleElement> titleElement) : m_titleElement(titleElement)
+    {
+        m_titleElement->m_ignoreTitleUpdatesWhenChildrenChange = true;
+    }
+    ~IgnoreTitleUpdatesWhenChildrenChange()
+    {
+        m_titleElement->m_ignoreTitleUpdatesWhenChildrenChange = false;
+    }
+private:
+    RefPtr<HTMLTitleElement> m_titleElement;
+};
+
 } //namespace
 
 #endif