Fix typo in text_encoder_stream.h

Change-Id: I39b60fb4607ee1e6b1987abf89c4f9e39a90d181
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1564586
Auto-Submit: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#651782}

third_party/blink/renderer/modules/encoding/text_encoder_stream.h

@@ -18,7 +18,7 @@ class ScriptState;
 class WritableStream;
 class Visitor;
 
-// Implements the TextDecoderStream interface as specified at
+// Implements the TextEncoderStream interface as specified at
 // https://encoding.spec.whatwg.org/#interface-textencoderstream.
 // Converts a stream of text data in the form of string chunks to a stream of
 // binary data in the form of UInt8Array chunks. After construction