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

Source/bindings/v8/custom/V8FileCustom.cpp

Index: Source/bindings/v8/custom/V8FileCustom.cpp
diff --git a/Source/bindings/v8/custom/V8FileCustom.cpp b/Source/bindings/v8/custom/V8FileCustom.cpp
index a89aa58a6b6019c437d9e0de5fe5c6dacbd267f7..1848c64ac6e71051ade95a482f6c2131e6b6a7b4 100644
--- a/Source/bindings/v8/custom/V8FileCustom.cpp
+++ b/Source/bindings/v8/custom/V8FileCustom.cpp
@@ -90,7 +90,7 @@ void V8File::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
         return;
 
     long long fileSize = blobData->length();
-    RefPtr<File> file = File::create(fileName, properties.lastModified(), BlobDataHandle::create(blobData.release(), fileSize));
+    RefPtrWillBeRawPtr<File> file = File::create(fileName, properties.lastModified(), BlobDataHandle::create(blobData.release(), fileSize));
     v8SetReturnValue(info, file.release());
 }