[wrapper-tracing] Untangle non-trivial mixin ctors

third_party/WebKit/Source/modules/cachestorage/CacheTest.cpp

 // 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.
 
 #include "modules/cachestorage/Cache.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptFunction.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
@@ skipping 686 matching lines @@
   const String contentType = "text/plain";
   const String content = "hello cache";
 
   ErrorWebCacheForTests* testCache;
   Cache* cache =
       createCache(fetcher, testCache = new NotImplementedErrorCache());
 
   fetcher->setExpectedFetchUrl(&url);
 
   Request* request = newRequestFromUrl(url);
-  Response* response =
-      Response::create(getScriptState(),
-                       new BodyStreamBuffer(getScriptState(),
-                                            new FormDataBytesConsumer(content)),
-                       contentType, ResponseInit(), exceptionState);
+  Response* response = Response::create(
+      getScriptState(),
+      BodyStreamBuffer::create(getScriptState(),
+                               new FormDataBytesConsumer(content)),
+      contentType, ResponseInit(), exceptionState);
   fetcher->setResponse(response);
 
   WebVector<WebServiceWorkerCache::BatchOperation> expectedPutOperations(
       size_t(1));
   {
     WebServiceWorkerCache::BatchOperation putOperation;
     putOperation.operationType = WebServiceWorkerCache::OperationTypePut;
     request->populateWebServiceWorkerRequest(putOperation.request);
     response->populateWebServiceWorkerResponse(putOperation.response);
     expectedPutOperations[0] = putOperation;
   }
   testCache->setExpectedBatchOperations(&expectedPutOperations);
 
   ScriptPromise addResult = cache->add(
       getScriptState(), requestToRequestInfo(request), exceptionState);
 
   EXPECT_EQ(kNotImplementedString, getRejectString(addResult));
   EXPECT_EQ(1, fetcher->fetchCount());
   EXPECT_EQ("dispatchBatch",
             testCache->getAndClearLastErrorWebCacheMethodCalled());
 }
 
 }  // namespace
 
 }  // namespace blink