Support ignorance of base class finalizers.

tools/clang/blink_gc_plugin/tests/class_requires_finalization_field.h

Index: tools/clang/blink_gc_plugin/tests/class_requires_finalization_field.h
diff --git a/tools/clang/blink_gc_plugin/tests/class_requires_finalization_field.h b/tools/clang/blink_gc_plugin/tests/class_requires_finalization_field.h
index 8d8ac3503223fc80fa990d7bad8284188f9b6b15..90a9ed439a7cd72e4c839a190c6a9ad15ad4ca8c 100644
--- a/tools/clang/blink_gc_plugin/tests/class_requires_finalization_field.h
+++ b/tools/clang/blink_gc_plugin/tests/class_requires_finalization_field.h
@@ -14,6 +14,15 @@ public:
     virtual void trace(Visitor*) { }
 };
 
+// WebCore::ScriptWrappable receives special treatment
+// so as to allow it to be used together with GarbageCollected<T>,
+// even when its user-declared destructor is provided.
+// As it is with Oilpan disabled.
+class ScriptWrappable {
+public:
+    ~ScriptWrappable() { /* user-declared, thus, non-trivial */ }
+};
+
 // Has a non-trivial dtor (user-declared).
 class B {
 public:
@@ -41,7 +50,7 @@ struct VectorTraits<WebCore::C> {
 namespace WebCore {
 
 // Off-heap vectors always need to be finalized.
-class NeedsFinalizer : public A {
+class NeedsFinalizer : public A, public ScriptWrappable {
 public:
     void trace(Visitor*);
 private:
@@ -58,7 +67,7 @@ private:
 };
 
 // On-heap vectors with no inlined objects never need to be finalized.
-class DoesNotNeedFinalizer : public A {
+class DoesNotNeedFinalizer : public A, public ScriptWrappable {
 public:
     void trace(Visitor*);
 private:
@@ -67,7 +76,7 @@ private:
 
 // On-heap vectors with inlined objects that don't need destruction
 // don't need to be finalized.
-class AlsoDoesNotNeedFinalizer : public A {
+class AlsoDoesNotNeedFinalizer : public A, public ScriptWrappable {
 public:
     void trace(Visitor*);
 private: