Remove "legacy" experimental stream support

third_party/WebKit/Source/bindings/core/v8/custom/V8XMLHttpRequestCustom.cpp

Index: third_party/WebKit/Source/bindings/core/v8/custom/V8XMLHttpRequestCustom.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/custom/V8XMLHttpRequestCustom.cpp b/third_party/WebKit/Source/bindings/core/v8/custom/V8XMLHttpRequestCustom.cpp
index f35c837682790188ba404c293790abd8de8b3b10..6bb598c257cdb7b69bff3287e515658acbbb5bfd 100644
--- a/third_party/WebKit/Source/bindings/core/v8/custom/V8XMLHttpRequestCustom.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/custom/V8XMLHttpRequestCustom.cpp
@@ -39,10 +39,8 @@
 #include "bindings/core/v8/V8Document.h"
 #include "bindings/core/v8/V8FormData.h"
 #include "bindings/core/v8/V8HTMLDocument.h"
-#include "bindings/core/v8/V8Stream.h"
 #include "core/dom/Document.h"
 #include "core/inspector/InspectorInstrumentation.h"
-#include "core/streams/Stream.h"
 #include "core/workers/WorkerGlobalScope.h"
 #include "core/xmlhttprequest/XMLHttpRequest.h"
 #include <v8.h>
@@ -110,12 +108,6 @@ void V8XMLHttpRequest::responseAttributeGetterCustom(
       return;
     }
 
-    case XMLHttpRequest::ResponseTypeLegacyStream: {
-      Stream* stream = xmlHttpRequest->responseLegacyStream();
-      v8SetReturnValueFast(info, stream, xmlHttpRequest);
-      return;
-    }
-
     case XMLHttpRequest::ResponseTypeArrayBuffer: {
       DOMArrayBuffer* arrayBuffer = xmlHttpRequest->responseArrayBuffer();
       v8SetReturnValueFast(info, arrayBuffer, xmlHttpRequest);