Update a comment and fix a possible crash in HTMLSelectElement::setRecalcListItems.

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

Index: third_party/WebKit/Source/core/html/HTMLSelectElementTest.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLSelectElementTest.cpp b/third_party/WebKit/Source/core/html/HTMLSelectElementTest.cpp
index f24144eaf158313da3e4cf038faaa687493c2caf..1b94a3dd5db94c443c1cc293f884e4e0c4eed236 100644
--- a/third_party/WebKit/Source/core/html/HTMLSelectElementTest.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLSelectElementTest.cpp
@@ -341,4 +341,13 @@ TEST_F(HTMLSelectElementTest, DefaultToolTip)
     EXPECT_EQ(String(), optgroup->defaultToolTip());
 }
 
+TEST_F(HTMLSelectElementTest, SetRecalcListItemsByOptgroupRemoval)
+{
+    document().documentElement()->setInnerHTML("<select><optgroup><option>sub1</option><option>sub2</option></optgroup></select>", ASSERT_NO_EXCEPTION);
+    document().view()->updateAllLifecyclePhases();
+    HTMLSelectElement* select = toHTMLSelectElement(document().body()->firstChild());
+    select->setInnerHTML("", ASSERT_NO_EXCEPTION);
+    // PASS if setInnerHTML didn't have a check failure.
+}
+
 } // namespace blink