Revert of Response construction with a ReadableStream

third_party/WebKit/Source/modules/fetch/Response.idl

Index: third_party/WebKit/Source/modules/fetch/Response.idl
diff --git a/third_party/WebKit/Source/modules/fetch/Response.idl b/third_party/WebKit/Source/modules/fetch/Response.idl
index 4ac9f4038fe0600beef44bcf31ac275b1b9cdccc..556488f7fe9ee8e8d35e432469ed8da2a170013b 100644
--- a/third_party/WebKit/Source/modules/fetch/Response.idl
+++ b/third_party/WebKit/Source/modules/fetch/Response.idl
@@ -6,11 +6,12 @@
 
 enum ResponseType { "basic", "cors", "default", "error", "opaque", "opaqueredirect" };
 
+// FIXME: Add union type: URLSearchParams
+typedef (Blob or ArrayBuffer or ArrayBufferView or FormData or USVString) BodyInit;
+
 [
-    // TODO(yhirano): We use "any" for body because the IDL processor doesn't
-    // recognize ReadableStream implemented with V8 extras. Fix it.
-    Constructor(optional any body, optional Dictionary responseInitDict),
-    ConstructorCallWith=ScriptState,
+    Constructor(optional BodyInit body, optional Dictionary responseInitDict),
+    ConstructorCallWith=ExecutionContext,
     Exposed=(Window,Worker),
     RaisesException=Constructor,
     ActiveDOMObject,