Add Stream support to FileReaderLoader.

Source/core/fileapi/FileReaderLoader.h

 /*
  * Copyright (C) 2010 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "weborigin/KURL.h"
 #include "wtf/Forward.h"
 #include "wtf/text/TextEncoding.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class Blob;
 class FileReaderLoaderClient;
 class ScriptExecutionContext;
+class Stream;
 class TextResourceDecoder;
 class ThreadableLoader;
 
 class FileReaderLoader : public ThreadableLoaderClient {
 public:
     enum ReadType {
         ReadAsArrayBuffer,
         ReadAsBinaryString,
         ReadAsBlob,
         ReadAsText,
         ReadAsDataURL
     };
 
     // If client is given, do the loading asynchronously. Otherwise, load synchronously.
     FileReaderLoader(ReadType, FileReaderLoaderClient*);
     ~FileReaderLoader();
 
     void start(ScriptExecutionContext*, Blob*);
+    void start(ScriptExecutionContext*, const Stream&);
     void cancel();
 
     // ThreadableLoaderClient
     virtual void didReceiveResponse(unsigned long, const ResourceResponse&);
     virtual void didReceiveData(const char*, int);
     virtual void didFinishLoading(unsigned long, double);
     virtual void didFail(const ResourceError&);
 
     String stringResult();
     PassRefPtr<ArrayBuffer> arrayBufferResult() const;
 #if ENABLE(STREAM)
     PassRefPtr<Blob> blobResult();
 #endif // ENABLE(STREAM)
     unsigned bytesLoaded() const { return m_bytesLoaded; }
     unsigned totalBytes() const { return m_totalBytes; }
     FileError::ErrorCode errorCode() const { return m_errorCode; }
 
     void setEncoding(const String&);
     void setDataType(const String& dataType) { m_dataType = dataType; }
 #if ENABLE(STREAM)
     void setRange(unsigned, unsigned);
 #endif // ENABLE(STREAM)
 
 private:
+    // We have start() methods for Blob and Stream instead of exposing this
+    // method so that users don't misuse this by calling with non Blob/Stream
+    // URL.
+    void startForURL(ScriptExecutionContext*, const KURL&);
     void terminate();
     void cleanup();
     void failed(FileError::ErrorCode);
     void convertToText();
     void convertToDataURL();
 
     bool isCompleted() const;
 
     static FileError::ErrorCode httpStatusCodeToErrorCode(int);
 
@@ skipping 21 matching lines @@
     bool m_hasRange;
     unsigned m_rangeStart;
     unsigned m_rangeEnd;
 
     FileError::ErrorCode m_errorCode;
 };
 
 } // namespace WebCore
 
 #endif // FileReaderLoader_h