Use TemporaryChange in HTMLTitleElement::setText

third_party/WebKit/Source/core/html/HTMLTitleElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLTitleElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLTitleElement.cpp b/third_party/WebKit/Source/core/html/HTMLTitleElement.cpp
index 6c25d4ac03072959cd6340aa4c74a0e1601e1163..e6d5b560b94921f4445a0abc2f1add69c17a53f4 100644
--- a/third_party/WebKit/Source/core/html/HTMLTitleElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLTitleElement.cpp
@@ -82,10 +82,11 @@ void HTMLTitleElement::setText(const String &value)
     RefPtrWillBeRawPtr<Node> protectFromMutationEvents(this);
     ChildListMutationScope mutation(*this);
 
-    // Avoid calling Document::setTitleElement() during intermediate steps.
-    m_ignoreTitleUpdatesWhenChildrenChange = !value.isEmpty();
-    removeChildren(OmitSubtreeModifiedEvent);
-    m_ignoreTitleUpdatesWhenChildrenChange = false;
+    {
+        // Avoid calling Document::setTitleElement() during intermediate steps.
+        TemporaryChange<bool> inhibitTitleUpdateScope(m_ignoreTitleUpdatesWhenChildrenChange, !value.isEmpty());
+        removeChildren(OmitSubtreeModifiedEvent);
+    }
 
     if (!value.isEmpty())
         appendChild(document().createTextNode(value.impl()), IGNORE_EXCEPTION);