Serializing <keygen> and <track> should not generate end tags.

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

Index: third_party/WebKit/Source/core/html/HTMLElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLElement.cpp b/third_party/WebKit/Source/core/html/HTMLElement.cpp
index fd68fa31ba72fa0ed183a71a9b33b27b5f67b11e..45166c149b7157d54e827dbefe7bb16559384195 100644
--- a/third_party/WebKit/Source/core/html/HTMLElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLElement.cpp
@@ -118,11 +118,13 @@ bool HTMLElement::ieForbidsInsertHTML() const
         || hasTagName(imageTag)
         || hasTagName(imgTag)
         || hasTagName(inputTag)
+        || hasTagName(keygenTag)
         || hasTagName(linkTag)
         || (RuntimeEnabledFeatures::contextMenuEnabled() && hasTagName(menuitemTag))
         || hasTagName(metaTag)
         || hasTagName(paramTag)
         || hasTagName(sourceTag)
+        || hasTagName(trackTag)
         || hasTagName(wbrTag))
         return true;
     return false;