Make Image::image_observer_ WeakPersistent

third_party/WebKit/Source/core/svg/graphics/SVGImage.cpp

 /*
  * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. 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.
@@ skipping 551 matching lines @@
   if (!root_element)
     return false;
   return root_element->TimeContainer()->HasAnimations() ||
          ToLocalFrame(page_->MainFrame())
              ->GetDocument()
              ->Timeline()
              .HasPendingUpdates();
 }
 
 void SVGImage::ServiceAnimations(double monotonic_animation_start_time) {
+  if (!GetImageObserver())
+    return;
+
   // If none of our observers (sic!) are visible, or for some other reason
   // does not want us to keep running animations, stop them until further
   // notice (next paint.)
   if (GetImageObserver()->ShouldPauseAnimation(this)) {
     StopAnimation();
     return;
   }
 
   // serviceScriptedAnimations runs requestAnimationFrame callbacks, but SVG
   // images can't have any so we assert there's no script.
@@ skipping 191 matching lines @@
 
   NOTREACHED();
   return kSizeAvailable;
 }
 
 String SVGImage::FilenameExtension() const {
   return "svg";
 }
 
 }  // namespace blink