Oilpan: have DOMException be on the heap by default.

Source/modules/fetch/BodyStreamBufferTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/fetch/BodyStreamBuffer.h"
 
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
@@ skipping 42 matching lines @@
     virtual ~BlobHandleCallback() override { }
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_exception);
         BodyStreamBuffer::BlobHandleCreatorClient::trace(visitor);
     }
     virtual void didCreateBlobHandle(PassRefPtr<BlobDataHandle> blobHandle) override
     {
         m_blobHandle = blobHandle;
     }
-    virtual void didFail(PassRefPtrWillBeRawPtr<DOMException> exception) override
+    virtual void didFail(DOMException* exception) override
     {
         m_exception = exception;
     }
     PassRefPtr<BlobDataHandle> blobHandle()
     {
         return m_blobHandle;
     }
-    PassRefPtrWillBeRawPtr<DOMException> exception()
+    DOMException* exception()
     {
         return m_exception;
     }
 
 private:
     RefPtr<BlobDataHandle> m_blobHandle;
-    RefPtrWillBeMember<DOMException> m_exception;
+    Member<DOMException> m_exception;
 };
 
 class MockCanceller : public BodyStreamBuffer::Canceller {
 public:
     MockCanceller() : m_counter(0) { }
     void cancel() override { ++m_counter; }
     int counter() const { return m_counter; }
 
 private:
     int m_counter;
@@ skipping 164 matching lines @@
     auto canceller = new MockCanceller;
     BodyStreamBuffer* buffer = new BodyStreamBuffer(canceller);
     buffer->cancel();
 
     EXPECT_EQ(1, canceller->counter());
     EXPECT_FALSE(buffer->isClosed());
     EXPECT_FALSE(buffer->hasError());
 }
 
 } // namespace blink