Teach Blink's IDL parser to handle defaulted sequences of strings.

Source/core/testing/DictionaryTest.cpp

Index: Source/core/testing/DictionaryTest.cpp
diff --git a/Source/core/testing/DictionaryTest.cpp b/Source/core/testing/DictionaryTest.cpp
index 7f49ecbf6b00c3d97b60185666beb76eb05dc316..57ff0452d155d07ece134543013699a44d3f4f94 100644
--- a/Source/core/testing/DictionaryTest.cpp
+++ b/Source/core/testing/DictionaryTest.cpp
@@ -47,6 +47,7 @@ void DictionaryTest::set(const InternalDictionary& testingDictionary)
     m_usvStringMember = testingDictionary.usvStringMember();
     if (testingDictionary.hasStringSequenceMember())
         m_stringSequenceMember = testingDictionary.stringSequenceMember();
+    m_stringSequenceMemberWithDefault = testingDictionary.stringSequenceMemberWithDefault();
     if (testingDictionary.hasStringSequenceOrNullMember())
         m_stringSequenceOrNullMember = testingDictionary.stringSequenceOrNullMember();
     m_enumMember = testingDictionary.enumMember();
@@ -90,6 +91,7 @@ void DictionaryTest::get(InternalDictionary& result)
     result.setUsvStringMember(m_usvStringMember);
     if (m_stringSequenceMember)
         result.setStringSequenceMember(m_stringSequenceMember.get());
+    result.setStringSequenceMemberWithDefault(m_stringSequenceMemberWithDefault);
     if (m_stringSequenceOrNullMember)
         result.setStringSequenceOrNullMember(m_stringSequenceOrNullMember.get());
     result.setEnumMember(m_enumMember);
@@ -140,6 +142,7 @@ void DictionaryTest::reset()
     m_stringMember = String();
     m_stringMemberWithDefault = String("Should not be returned");
     m_stringSequenceMember = nullptr;
+    m_stringSequenceMemberWithDefault.fill("Should not be returned", 1);
     m_stringSequenceOrNullMember = nullptr;
     m_enumMember = String();
     m_enumMemberWithDefault = String();