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

Source/modules/webgl/OESStandardDerivatives.cpp

Index: Source/modules/webgl/OESStandardDerivatives.cpp
diff --git a/Source/modules/webgl/OESStandardDerivatives.cpp b/Source/modules/webgl/OESStandardDerivatives.cpp
index 6f766eb7718bd954be03a0e5496c51583f9508ac..e110819f04f7a8a22a122b0da72b59ed23c4ebd3 100644
--- a/Source/modules/webgl/OESStandardDerivatives.cpp
+++ b/Source/modules/webgl/OESStandardDerivatives.cpp
@@ -44,9 +44,9 @@
     return OESStandardDerivativesName;
 }
 
-OESStandardDerivatives* OESStandardDerivatives::create(WebGLRenderingContextBase* context)
+PassRefPtrWillBeRawPtr<OESStandardDerivatives> OESStandardDerivatives::create(WebGLRenderingContextBase* context)
 {
-    return new OESStandardDerivatives(context);
+    return adoptRefWillBeNoop(new OESStandardDerivatives(context));
 }
 
 bool OESStandardDerivatives::supported(WebGLRenderingContextBase* context)