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

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

Index: third_party/WebKit/Source/core/html/HTMLInputElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLInputElement.h b/third_party/WebKit/Source/core/html/HTMLInputElement.h
index 0d29aa42872078c688a19cb62b4780d85f984dcc..71982f3e909b8700143741f6a790f4b55dc9d9c1 100644
--- a/third_party/WebKit/Source/core/html/HTMLInputElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLInputElement.h
@@ -30,6 +30,7 @@
 #include "core/html/TextControlElement.h"
 #include "core/html/forms/StepRange.h"
 #include "platform/FileChooser.h"
+#include "platform/bindings/ActiveScriptWrappable.h"
 
 namespace blink {
 
@@ -46,14 +47,19 @@ class ListAttributeTargetObserver;
 class RadioButtonGroupScope;
 struct DateTimeChooserParameters;
 
-class CORE_EXPORT HTMLInputElement : public TextControlElement {
+class CORE_EXPORT HTMLInputElement
+    : public TextControlElement,
+      public ActiveScriptWrappable<HTMLInputElement> {
   DEFINE_WRAPPERTYPEINFO();
+  USING_GARBAGE_COLLECTED_MIXIN(HTMLInputElement);
 
  public:
   static HTMLInputElement* Create(Document&, bool created_by_parser);
   ~HTMLInputElement() override;
   DECLARE_VIRTUAL_TRACE();
 
+  bool HasPendingActivity() const final;
+
   DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitspeechchange);
 
   bool ShouldAutocomplete() const final;