https://bugs.webkit.org/show_bug.cgi?id=122136

Reviewed by Antti Koivisto.

Source/WebCore:

* Modules/websockets/WebSocket.cpp:
(WebCore::WebSocket::didReceiveBinaryData):
* WebCore.exp.in:
* fileapi/Blob.cpp:
(WebCore::Blob::Blob):
(WebCore::Blob::slice):
* fileapi/Blob.h:
(WebCore::Blob::create):
* fileapi/File.cpp:
(WebCore::createBlobDataForFileWithType):
(WebCore::createBlobDataForFile):
(WebCore::createBlobDataForFileWithName):
* fileapi/ThreadableBlobRegistry.cpp:
(WebCore::BlobRegistryContext::BlobRegistryContext):
(WebCore::registerBlobURLTask):
(WebCore::ThreadableBlobRegistry::registerBlobURL):
* fileapi/ThreadableBlobRegistry.h:
* fileapi/WebKitBlobBuilder.cpp:
(WebCore::BlobBuilder::getBlob):
* platform/network/BlobData.cpp:
(WebCore::BlobDataHandle::BlobDataHandle):
* platform/network/BlobData.h:
(WebCore::BlobData::BlobData):
(WebCore::BlobDataHandle::create):
* platform/network/BlobRegistry.h:
* platform/network/BlobRegistryImpl.cpp:
(WebCore:...