Remove the lifetime hack in ImageLoader where it keeps its assoc element alive

third_party/WebKit/Source/core/svg/SVGImageElement.h

Index: third_party/WebKit/Source/core/svg/SVGImageElement.h
diff --git a/third_party/WebKit/Source/core/svg/SVGImageElement.h b/third_party/WebKit/Source/core/svg/SVGImageElement.h
index 50af0dbf38af6ecbcc1368e90d686f228c67d271..18a375cca9363ea6545daea4060f1894a528b3bd 100644
--- a/third_party/WebKit/Source/core/svg/SVGImageElement.h
+++ b/third_party/WebKit/Source/core/svg/SVGImageElement.h
@@ -27,13 +27,16 @@
 #include "core/svg/SVGGraphicsElement.h"
 #include "core/svg/SVGImageLoader.h"
 #include "core/svg/SVGURIReference.h"
+#include "platform/bindings/ActiveScriptWrappable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
-class CORE_EXPORT SVGImageElement final : public SVGGraphicsElement,
-                                          public ImageElementBase,
-                                          public SVGURIReference {
+class CORE_EXPORT SVGImageElement final
+    : public SVGGraphicsElement,
+      public ImageElementBase,
+      public SVGURIReference,
+      public ActiveScriptWrappable<SVGImageElement> {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(SVGImageElement);
 
@@ -51,6 +54,10 @@ class CORE_EXPORT SVGImageElement final : public SVGGraphicsElement,
     return preserve_aspect_ratio_.Get();
   }
 
+  bool HasPendingActivity() const final {
+    return GetImageLoader().HasPendingActivity();
+  }
+
   // Exposed for testing.
   ImageResourceContent* CachedImage() const {
     return GetImageLoader().GetImage();