bindings: Make the sequence conversion code more complaint with WebIDL.

third_party/WebKit/Source/core/testing/Internals.h

Index: third_party/WebKit/Source/core/testing/Internals.h
diff --git a/third_party/WebKit/Source/core/testing/Internals.h b/third_party/WebKit/Source/core/testing/Internals.h
index 5a2812358f22458c1d53978473ea74d6302ff1fd..cfa6e792f6c4b24fc93d313c0861c2f7e83e8870 100644
--- a/third_party/WebKit/Source/core/testing/Internals.h
+++ b/third_party/WebKit/Source/core/testing/Internals.h
@@ -70,6 +70,7 @@ class OriginTrialsTest;
 class Page;
 class Range;
 class RecordTest;
+class SequenceTest;
 class SerializedScriptValue;
 class ShadowRoot;
 class TypeConversions;
@@ -383,6 +384,7 @@ class Internals final : public GarbageCollected<Internals>,
 
   TypeConversions* typeConversions() const;
   RecordTest* recordTest() const;
+  SequenceTest* sequenceTest() const;
   DictionaryTest* dictionaryTest() const;
   UnionTypesTest* unionTypesTest() const;
   OriginTrialsTest* originTrialsTest() const;