Revert of [Oilpan] Migrate classes under module/webgl onto oilpan heap

Source/modules/webgl/WebGLFenceSync.cpp

 // Copyright 2015 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 "config.h"
 
 #include "modules/webgl/WebGLFenceSync.h"
 
 #include "modules/webgl/WebGL2RenderingContextBase.h"
 
 namespace blink {
 
-WebGLSync* WebGLFenceSync::create(WebGL2RenderingContextBase* ctx, GLenum condition, GLbitfield flags)
+PassRefPtrWillBeRawPtr<WebGLSync> WebGLFenceSync::create(WebGL2RenderingContextBase* ctx, GLenum condition, GLbitfield flags)
 {
-    return new WebGLFenceSync(ctx, condition, flags);
+    return adoptRefWillBeNoop(new WebGLFenceSync(ctx, condition, flags));
 }
 
 WebGLFenceSync::~WebGLFenceSync()
 {
 }
 
 WebGLFenceSync::WebGLFenceSync(WebGL2RenderingContextBase* ctx, GLenum condition, GLbitfield flags)
     : WebGLSync(ctx, ctx->webContext()->fenceSync(condition, flags), GL_SYNC_FENCE)
 {
 }
 
 } // namespace blink