Schedule bitmap animation timers on the compositor task runner.

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

Index: third_party/WebKit/Source/core/html/HTMLImageElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLImageElement.cpp b/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
index 6046a9a2e50970d918b0fa402a6e69574b2755c1..60d8e4fc8fe6fce69f2b10e3c4b084f2501384c2 100644
--- a/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
@@ -32,6 +32,7 @@
 #include "core/css/parser/SizesAttributeParser.h"
 #include "core/dom/Attribute.h"
 #include "core/dom/NodeTraversal.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/frame/Deprecation.h"
 #include "core/frame/ImageBitmap.h"
@@ -372,8 +373,10 @@ void HTMLImageElement::AttachLayoutTree(const AttachContext& context) {
           blink::DeviceScaleFactorDeprecated(layout_image->GetFrame());
       std::pair<Image*, float> broken_image_and_image_scale_factor =
           ImageResourceContent::BrokenImage(device_scale_factor);
+      RefPtr<WebTaskRunner> task_runner = TaskRunnerHelper::Get(
+          TaskType::kAnimationTimer, &this->GetDocument());
       ImageResourceContent* new_image_resource = ImageResourceContent::Create(
-          broken_image_and_image_scale_factor.first);
+          task_runner, broken_image_and_image_scale_factor.first);
       layout_image->ImageResource()->SetImageResource(new_image_resource);
     }
     if (layout_image_resource->HasImage())