Chromium Blob hacking

content/child/fileapi/webfilewriter_base.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_FILEAPI_WEBFILEWRITER_BASE_H_
 #define CONTENT_CHILD_FILEAPI_WEBFILEWRITER_BASE_H_
 
 #include "base/platform_file.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/web/WebFileWriter.h"
 #include "url/gurl.h"
 
 namespace WebKit {
 class WebFileWriterClient;
 class WebURL;
 }
 
 namespace content {
 
 class CONTENT_EXPORT WebFileWriterBase
     : public NON_EXPORTED_BASE(WebKit::WebFileWriter) {
  public:
   WebFileWriterBase(const GURL& path, WebKit::WebFileWriterClient* client);
   virtual ~WebFileWriterBase();
 
   // WebFileWriter implementation
   virtual void truncate(long long length);
+  virtual void write(long long position, const WebKit::WebString& id);
+  virtual void cancel();
+
+  // DEPRECATED: see crbug/174200
   virtual void write(long long position, const WebKit::WebURL& blobURL);
-  virtual void cancel();
 
  protected:
   // This calls DidSucceed() or DidFail() based on the value of |error_code|.
   void DidFinish(base::PlatformFileError error_code);
 
   void DidWrite(int64 bytes, bool complete);
   void DidSucceed();
   void DidFail(base::PlatformFileError error_code);
 
   // Derived classes must provide these methods to asynchronously perform
   // the requested operation, and they must call the appropiate DidSomething
   // method upon completion and as progress is made in the Write case.
   virtual void DoTruncate(const GURL& path, int64 offset) = 0;
+  virtual void DoWriteDeprecated(const GURL& path,
+                                 const GURL& blob_url,
+                                 int64 offset) = 0;
   virtual void DoWrite(const GURL& path,
-                       const GURL& blob_url,
+                       const std::string& blob_id,
                        int64 offset) = 0;
   virtual void DoCancel() = 0;
 
  private:
   enum OperationType {
     kOperationNone,
     kOperationWrite,
     kOperationTruncate
   };
 
   enum CancelState {
     kCancelNotInProgress,
     kCancelSent,
     kCancelReceivedWriteResponse,
   };
 
   void FinishCancel();
 
   GURL path_;
   WebKit::WebFileWriterClient* client_;
   OperationType operation_;
   CancelState cancel_state_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_FILEAPI_WEBFILEWRITER_BASE_H_