Oilpan: have DOMException be on the heap by default.

Source/modules/bluetooth/BluetoothError.h

Index: Source/modules/bluetooth/BluetoothError.h
diff --git a/Source/modules/bluetooth/BluetoothError.h b/Source/modules/bluetooth/BluetoothError.h
index 279103031b9cc63887608553660ceccbcfab643a..d1e982f292bdffa3c015bb673c6b8b527c30cc41 100644
--- a/Source/modules/bluetooth/BluetoothError.h
+++ b/Source/modules/bluetooth/BluetoothError.h
@@ -5,11 +5,11 @@
 #ifndef BluetoothError_h
 #define BluetoothError_h
 
-#include "core/dom/DOMException.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
+class DOMException;
 class ScriptPromiseResolver;
 struct WebBluetoothError;
 
@@ -20,7 +20,7 @@ class BluetoothError {
 public:
     // Interface required by CallbackPromiseAdapter:
     typedef WebBluetoothError WebType;
-    static PassRefPtrWillBeRawPtr<DOMException> take(ScriptPromiseResolver*, WebBluetoothError*);
+    static DOMException* take(ScriptPromiseResolver*, WebBluetoothError*);
     static void dispose(blink::WebBluetoothError*);
 
 private: