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

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 3403 matching lines @@
     GetLayoutObject()->UpdateFromElement();
 
   StopPeriodicTimers();
 
   // Ensure that hasPendingActivity() is not preventing garbage collection,
   // since otherwise this media element will simply leak.
   DCHECK(!HasPendingActivity());
 }
 
 bool HTMLMediaElement::HasPendingActivity() const {
+  if (HasPendingActivityInternal())
+    return true;
+
   // The delaying-the-load-event flag is set by resource selection algorithm
   // when looking for a resource to load, before networkState has reached to
   // kNetworkLoading.
   if (should_delay_load_event_)
     return true;
 
   // When networkState is kNetworkLoading, progress and stalled events may be
   // fired.
   if (network_state_ == kNetworkLoading)
     return true;
@@ skipping 650 matching lines @@
       kMostlyFillViewportBecomeStableSeconds, BLINK_FROM_HERE);
 }
 
 void HTMLMediaElement::ViewportFillDebouncerTimerFired(TimerBase*) {
   mostly_filling_viewport_ = true;
   if (web_media_player_)
     web_media_player_->BecameDominantVisibleContent(mostly_filling_viewport_);
 }
 
 }  // namespace blink