ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/core/html/HTMLImageElement.h

Index: third_party/WebKit/Source/core/html/HTMLImageElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLImageElement.h b/third_party/WebKit/Source/core/html/HTMLImageElement.h
index 372bac8fabd79c7d5e4362409a7f9ea51d563dd6..ff0d3465929be82f89589c302f33d68585099594 100644
--- a/third_party/WebKit/Source/core/html/HTMLImageElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLImageElement.h
@@ -42,11 +42,12 @@ class ImageCandidate;
 class ShadowRoot;
 class ImageBitmapOptions;
 
-class CORE_EXPORT HTMLImageElement final : public HTMLElement,
-                                           public CanvasImageSource,
-                                           public ImageBitmapSource,
-                                           public ActiveScriptWrappable,
-                                           public FormAssociated {
+class CORE_EXPORT HTMLImageElement final
+    : public HTMLElement,
+      public CanvasImageSource,
+      public ImageBitmapSource,
+      public ActiveScriptWrappable<HTMLImageElement>,
+      public FormAssociated {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(HTMLImageElement);