Sync Blob.close() behavior wrt updated spec.

Source/core/fileapi/File.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #ifndef File_h
 #define File_h
 
 #include "core/fileapi/Blob.h"
 #include "heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
+class ExceptionState;
 class ExecutionContext;
 struct FileMetadata;
 class KURL;
 
 class File FINAL : public Blob {
 public:
     // AllContentTypes should only be used when the full path/name are trusted; otherwise, it could
     // allow arbitrary pages to determine what applications an user has installed.
     enum ContentTypeLookupPolicy {
         WellKnownContentTypes,
@@ skipping 35 matching lines @@
 
     // Create a file with a name exposed to the author (via File.name and associated DOM properties) that differs from the one provided in the path.
     static PassRefPtrWillBeRawPtr<File> createWithName(const String& path, const String& name, ContentTypeLookupPolicy policy = WellKnownContentTypes)
     {
         if (name.isEmpty())
             return adoptRefWillBeNoop(new File(path, policy));
         return adoptRefWillBeNoop(new File(path, name, policy));
     }
 
     virtual unsigned long long size() const OVERRIDE;
-    virtual PassRefPtrWillBeRawPtr<Blob> slice(long long start = 0, long long end = std::numeric_limits<long long>::max(), const String& contentType = String()) const OVERRIDE;
-    virtual void close(ExecutionContext*) OVERRIDE;
+    virtual PassRefPtrWillBeRawPtr<Blob> slice(long long start, long long end, const String& contentType, ExceptionState&) const OVERRIDE;
+    virtual void close(ExecutionContext*, ExceptionState&) OVERRIDE;
 
     virtual bool isFile() const OVERRIDE { return true; }
     virtual bool hasBackingFile() const OVERRIDE { return m_hasBackingFile; }
 
     virtual void appendTo(BlobData&) const OVERRIDE;
 
     const String& path() const { ASSERT(hasValidFilePath()); return m_path; }
     const String name() const { return m_name; }
 
     // This returns the current date and time if the file's last modification date is not known (per spec: http://www.w3.org/TR/FileAPI/#dfn-lastModifiedDate).
@@ skipping 36 matching lines @@
     const double m_snapshotModificationTime;
 
     String m_relativePath;
 };
 
 DEFINE_TYPE_CASTS(File, Blob, blob, blob->isFile(), blob.isFile());
 
 } // namespace WebCore
 
 #endif // File_h