Enable Oilpan for modules/geolocation by default.

Source/modules/geolocation/PositionOptions.h

Index: Source/modules/geolocation/PositionOptions.h
diff --git a/Source/modules/geolocation/PositionOptions.h b/Source/modules/geolocation/PositionOptions.h
index dca924c8aa7e2799a17302eb241bc14860aa0ab6..19b8cfdb992b3be4e5012b5256b73c3f9a13cf48 100644
--- a/Source/modules/geolocation/PositionOptions.h
+++ b/Source/modules/geolocation/PositionOptions.h
@@ -27,14 +27,13 @@
 #define PositionOptions_h
 
 #include "platform/heap/Handle.h"
-#include "wtf/RefCounted.h"
 #include <limits.h>
 
 namespace WebCore {
 
-class PositionOptions : public RefCountedWillBeGarbageCollected<PositionOptions> {
+class PositionOptions : public GarbageCollected<PositionOptions> {
 public:
-    static PassRefPtrWillBeRawPtr<PositionOptions> create() { return adoptRefWillBeNoop(new PositionOptions()); }
+    static PositionOptions* create() { return new PositionOptions(); }
     void trace(Visitor*) { }
 
     bool enableHighAccuracy() const { return m_highAccuracy; }