Oilpan: move core/fileapi to oilpan's heap.

Source/core/clipboard/DataObjectItem.cpp

Index: Source/core/clipboard/DataObjectItem.cpp
diff --git a/Source/core/clipboard/DataObjectItem.cpp b/Source/core/clipboard/DataObjectItem.cpp
index 896a70fb54b7cebb96f728b9b8e2f07a1438610f..10fc8314dfe9d7a8243f598d60fb3ca9cad9b5c5 100644
--- a/Source/core/clipboard/DataObjectItem.cpp
+++ b/Source/core/clipboard/DataObjectItem.cpp
@@ -48,7 +48,7 @@ PassRefPtrWillBeRawPtr<DataObjectItem> DataObjectItem::createFromString(const St
     return item.release();
 }
 
-PassRefPtrWillBeRawPtr<DataObjectItem> DataObjectItem::createFromFile(PassRefPtr<File> file)
+PassRefPtrWillBeRawPtr<DataObjectItem> DataObjectItem::createFromFile(PassRefPtrWillBeRawPtr<File> file)
 {
     RefPtrWillBeRawPtr<DataObjectItem> item = adoptRefWillBeNoop(new DataObjectItem(FileKind, file->type()));
     item->m_file = file;
@@ -102,14 +102,14 @@ DataObjectItem::DataObjectItem(Kind kind, const String& type, uint64_t sequenceN
 {
 }
 
-PassRefPtr<Blob> DataObjectItem::getAsFile() const
+PassRefPtrWillBeRawPtr<Blob> DataObjectItem::getAsFile() const
 {
     if (kind() != FileKind)
         return nullptr;
 
     if (m_source == InternalSource) {
         if (m_file)
-            return m_file;
+            return m_file.get();
         ASSERT(m_sharedBuffer);
         // FIXME: This code is currently impossible--we never populate m_sharedBuffer when dragging
         // in. At some point though, we may need to support correctly converting a shared buffer
@@ -172,5 +172,10 @@ bool DataObjectItem::isFilename() const
     return m_kind == FileKind && m_file;
 }
 
+void DataObjectItem::trace(Visitor* visitor)
+{
+    visitor->trace(m_file);
+}
+
 } // namespace WebCore