Removed stray declared method.

Left-over from the removal of diffNeedsRecompositeLayer [1].

[1] https://codereview.chromium.org/360103008

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/565583002

git-svn-id: svn://svn.chromium.org/blink/trunk@181801 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[XHR] Accept data on didReceiveData call even if responseType is set to Blob

Since Blink 175446
https://src.chromium.org/viewvc/blink?revision=175446&view=revision
we're loading data into a file. The downloadToFile flag is determined in
createRequest() i.e. inside xhr.send() call. But responseType is allowed
to be changed even after xhr.send() call.

Accumulate data into m_binaryResponseBuilder and create a Blob from it
anyway if m_downloadingToFile is not set.

BUG=412704

Review URL: https://codereview.chromium.org/562563003

git-svn-id: svn://svn.chromium.org/blink/trunk@181802 bbb929c8-8fbe-4397-9dbb-9b2b20218538