Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

modules/fetch/Response.idl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // http://fetch.spec.whatwg.org/#response-class
 
-enum ResponseType { "basic", "cors", "default", "error", "opaque" };
-
-// FIXME: Add union type: URLSearchParams
-typedef (Blob or ArrayBuffer or ArrayBufferView or FormData or USVString) BodyInit;
+enum ResponseType { "basic", "cors", "default", "error", "opaque", "opaqueredirect" };
 
 [
-    Constructor(optional BodyInit body, optional Dictionary responseInitDict),
-    ConstructorCallWith=ExecutionContext,
+    // 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,
     Exposed=(Window,Worker),
     RaisesException=Constructor,
-    ActiveDOMObject,
+    DependentLifetime,
     GarbageCollected,
-    TypeChecking=Interface,
 ] interface Response {
     [CallWith=ExecutionContext] static Response error();
     [CallWith=ExecutionContext, RaisesException] static Response redirect(USVString url, optional unsigned short status = 302);
     readonly attribute ResponseType type;
     readonly attribute USVString url;
     readonly attribute unsigned short status;
     readonly attribute boolean ok;
     readonly attribute ByteString statusText;
     readonly attribute Headers headers;
 
     [RaisesException] Response clone();
 
-    readonly attribute ReadableByteStream body;
+    [ImplementedAs=bodyWithUseCounter] readonly attribute ReadableByteStream body;
 };
 
 Response implements Body;