Oilpan: have Navigator and its supplements be on the heap by default.

Source/modules/webmidi/NavigatorWebMIDI.h

Index: Source/modules/webmidi/NavigatorWebMIDI.h
diff --git a/Source/modules/webmidi/NavigatorWebMIDI.h b/Source/modules/webmidi/NavigatorWebMIDI.h
index 2f245a4928a806f61923573a21ea1c0ca9941942..05a8b8960fca595bedb7bb889901f6544a24c9eb 100644
--- a/Source/modules/webmidi/NavigatorWebMIDI.h
+++ b/Source/modules/webmidi/NavigatorWebMIDI.h
@@ -41,11 +41,11 @@ namespace blink {
 
 class Navigator;
 
-class NavigatorWebMIDI final : public NoBaseWillBeGarbageCollected<NavigatorWebMIDI>, public WillBeHeapSupplement<Navigator>, public DOMWindowProperty {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(NavigatorWebMIDI);
-    DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(NavigatorWebMIDI);
+class NavigatorWebMIDI final : public GarbageCollectedFinalized<NavigatorWebMIDI>, public HeapSupplement<Navigator>, public DOMWindowProperty {
+    USING_GARBAGE_COLLECTED_MIXIN(NavigatorWebMIDI);
 public:
     static NavigatorWebMIDI& from(Navigator&);
+    virtual ~NavigatorWebMIDI();
 
     static ScriptPromise requestMIDIAccess(ScriptState*, Navigator&, const MIDIOptions&);
     ScriptPromise requestMIDIAccess(ScriptState*, const MIDIOptions&);
@@ -53,7 +53,7 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    NavigatorWebMIDI(LocalFrame*);
+    explicit NavigatorWebMIDI(LocalFrame*);
     static const char* supplementName();
 };