[wrapper-tracing] Fix WebGL extension and attachment handling

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
index f7ef3d93317699542252fd056dceec0e5e5420ad..9240884ee8718c62410b7b6dca462d0dcfef5044 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
@@ -7693,8 +7693,7 @@ DEFINE_TRACE_WRAPPERS(WebGLRenderingContextBase) {
     visitor->traceWrappers(unit.m_texture2DArrayBinding);
   }
   for (ExtensionTracker* tracker : m_extensions) {
-    WebGLExtension* extension = tracker->getExtensionObjectIfAlreadyEnabled();
-    visitor->traceWrappers(extension);
+    visitor->traceWrappers(tracker);
   }
   CanvasRenderingContext::traceWrappers(visitor);
 }