Implement Asynchronous image encoding for Canvas.toBlob

third_party/WebKit/Source/core/fileapi/File.cpp

 /*
  * 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 95 matching lines @@
     bool normalizeLineEndingsToNative = options.endings() == "native";
 
     OwnPtr<BlobData> blobData = BlobData::create();
     blobData->setContentType(options.type().lower());
     populateBlobData(blobData.get(), fileBits, normalizeLineEndingsToNative);
 
     long long fileSize = blobData->length();
     return File::create(fileName, lastModified, BlobDataHandle::create(blobData.release(), fileSize));
 }
 
-File* File::create(char* data, size_t bytes, const String& mimeType)
+File* File::create(const char* data, size_t bytes, const String& mimeType)
 {
     ASSERT(data);
 
     OwnPtr<BlobData> blobData = BlobData::create();
     blobData->setContentType(mimeType);
     blobData->appendBytes(data, bytes);
     long long blobSize = blobData->length();
 
     // create blob as the type of file with two additional attributes -- name and lastModificationTime
     return File::create("", currentTimeMS(), BlobDataHandle::create(blobData.release(), blobSize));
@@ skipping 241 matching lines @@
     if (m_fileSystemURL.isEmpty() != other.m_fileSystemURL.isEmpty())
         return false;
 
     if (!m_fileSystemURL.isEmpty())
         return m_fileSystemURL == other.m_fileSystemURL;
 
     return uuid() == other.uuid();
 }
 
 } // namespace blink