Make Image::image_observer_ WeakPersistent

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

Index: third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.cpp
diff --git a/third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.cpp b/third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.cpp
index de6e9ec4ff408fbbe1808d91da72d759099766d8..5af954d40313b9ca606638abaa1b3dde9c4562b8 100644
--- a/third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.cpp
+++ b/third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.cpp
@@ -114,11 +114,12 @@ void SVGImageChromeClient::AnimationTimerFired(TimerBase*) {
 
   // The SVGImageChromeClient object's lifetime is dependent on
   // the ImageObserver (an ImageResourceContent) of its image. Should it
-  // be dead and about to be lazily swept out, do not proceed.
+  // be dead and about to be lazily swept out, then GetImageObserver()
+  // becomes null and we do not proceed.
   //
   // TODO(Oilpan): move (SVG)Image to the Oilpan heap, and avoid
   // this explicit lifetime check.
-  if (ThreadHeap::WillObjectBeLazilySwept(image_->GetImageObserver()))
+  if (!image_->GetImageObserver())
     return;
 
   image_->ServiceAnimations(MonotonicallyIncreasingTime());