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

Source/modules/webgl/EXTsRGB.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 "config.h"
 
 #include "modules/webgl/EXTsRGB.h"
 
 #include "modules/webgl/WebGLRenderingContextBase.h"
 
 namespace blink {
 
 EXTsRGB::EXTsRGB(WebGLRenderingContextBase* context)
     : WebGLExtension(context)
 {
     context->extensionsUtil()->ensureExtensionEnabled("GL_EXT_sRGB");
 }
 
 EXTsRGB::~EXTsRGB()
 {
 }
 
 WebGLExtensionName EXTsRGB::name() const
 {
     return EXTsRGBName;
 }
 
-EXTsRGB* EXTsRGB::create(WebGLRenderingContextBase* context)
+PassRefPtrWillBeRawPtr<EXTsRGB> EXTsRGB::create(WebGLRenderingContextBase* context)
 {
-    return new EXTsRGB(context);
+    return adoptRefWillBeNoop(new EXTsRGB(context));
 }
 
 bool EXTsRGB::supported(WebGLRenderingContextBase* context)
 {
     Extensions3DUtil* extensionsUtil = context->extensionsUtil();
     return extensionsUtil->supportsExtension("GL_EXT_sRGB");
 }
 
 const char* EXTsRGB::extensionName()
 {
     return "EXT_sRGB";
 }
 
 } // namespace blink