Blink Blobs: Allow creation of WebBlob from just UUID.

public/web/WebBlob.h

 /*
  * Copyright (C) 2011 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 44 matching lines @@
     ~WebBlob() { reset(); }
 
     WebBlob() { }
     WebBlob(const WebBlob& b) { assign(b); }
     WebBlob& operator=(const WebBlob& b)
     {
         assign(b);
         return *this;
     }
 
+    BLINK_EXPORT static WebBlob createFromUUID(const WebString& uuid, const WebString& type, long long size);
     BLINK_EXPORT static WebBlob createFromFile(const WebString& path, long long size);
     BLINK_EXPORT static WebBlob fromV8Value(v8::Handle<v8::Value>);
 
     BLINK_EXPORT void reset();
     BLINK_EXPORT void assign(const WebBlob&);
     BLINK_EXPORT WebString uuid();
 
     bool isNull() const { return m_private.isNull(); }
 
     BLINK_EXPORT v8::Handle<v8::Value>  toV8Value();
 
 #if BLINK_IMPLEMENTATION
     explicit WebBlob(const PassRefPtrWillBeRawPtr<WebCore::Blob>&);
     WebBlob& operator=(const PassRefPtrWillBeRawPtr<WebCore::Blob>&);
 #endif
 
 protected:
     WebPrivatePtr<WebCore::Blob> m_private;
 };
 
 } // namespace blink
 
 #endif // WebBlob_h