Add support of sending blob data for RTCDataChannel

LayoutTests/fast/mediastream/RTCPeerConnection-datachannel-blob-expected.txt

Index: LayoutTests/fast/mediastream/RTCPeerConnection-datachannel-blob-expected.txt
diff --git a/LayoutTests/fast/mediastream/RTCPeerConnection-datachannel-blob-expected.txt b/LayoutTests/fast/mediastream/RTCPeerConnection-datachannel-blob-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6dd4f33710695767f21e9d6223be2aac0f24061e
--- /dev/null
+++ b/LayoutTests/fast/mediastream/RTCPeerConnection-datachannel-blob-expected.txt
@@ -0,0 +1,33 @@
+Tests RTCDataChannel sending blob data.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS pc is connected
+PASS dc = pc.createDataChannel("label"); did not throw exception.
+PASS dc.readyState is 'connecting'
+PASS dc.binaryType is "blob"
+PASS pc_ondatachannel was called
+PASS dc_onopen was called
+PASS dc.readyState is 'open'
+PASS dc.label is 'label'
+PASS dc.send(blob); did not throw exception.
+PASS dc_onmessage_blob was called
+PASS data instanceof window.Blob is true
+PASS Blob data was reveived correctly.
+PASS Got fileSystem
+PASS File created.
+PASS fileEntry.isFile is true
+PASS Wrote to file.
+PASS Got File object successfully.
+PASS dc.send(fileObject); did not throw exception.
+PASS dc_onmessage_file was called
+PASS data instanceof window.Blob is true
+PASS File data is received correctly.
+PASS Deleting the file.
+PASS dc_onclose was called
+PASS dc.readyState is 'closed'
+PASS successfullyParsed is true
+
+TEST COMPLETE
+