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

Source/core/fileapi/Blob.cpp

Index: Source/core/fileapi/Blob.cpp
diff --git a/Source/core/fileapi/Blob.cpp b/Source/core/fileapi/Blob.cpp
index 4fa8e1f947b7f35a4758164e9c749141686ff264..75bd1a2d5787b688447db2f5d7cbfabf813acacd 100644
--- a/Source/core/fileapi/Blob.cpp
+++ b/Source/core/fileapi/Blob.cpp
@@ -31,6 +31,7 @@
 #include "config.h"
 #include "core/fileapi/Blob.h"
 
+#include "core/fileapi/File.h"
 #include "platform/blob/BlobRegistry.h"
 #include "platform/blob/BlobURL.h"
 
@@ -99,7 +100,7 @@ void Blob::clampSliceOffsets(long long size, long long& start, long long& end)
         end = size;
 }
 
-PassRefPtr<Blob> Blob::slice(long long start, long long end, const String& contentType) const
+PassRefPtrWillBeRawPtr<Blob> Blob::slice(long long start, long long end, const String& contentType) const
 {
     long long size = this->size();
     clampSliceOffsets(size, start, end);
@@ -121,5 +122,4 @@ URLRegistry& Blob::registry() const
     return BlobURLRegistry::registry();
 }
 
-
 } // namespace WebCore