Schedule bitmap animation timers on the compositor task runner.

third_party/WebKit/Source/core/css/CSSImageSetValue.cpp

Index: third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp b/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
index a1fdbd14778d3dff499a62718d1cdd1314636808..3f5cb8ab1f2ee36007ff732fbaf08cbfd8aa95d0 100644
--- a/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
+++ b/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
@@ -29,6 +29,7 @@
 #include "core/css/CSSImageValue.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/dom/Document.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/frame/Settings.h"
 #include "core/loader/resource/ImageResourceContent.h"
 #include "core/style/StyleFetchedImageSet.h"
@@ -123,8 +124,11 @@ StyleImage* CSSImageSetValue::CacheImage(
         document.GetSettings()->GetFetchImagePlaceholders())
       params.SetAllowImagePlaceholder();
 
-    if (ImageResourceContent* cached_image =
-            ImageResourceContent::Fetch(params, document.Fetcher())) {
+    // TODO(delphick): const_cast
+    RefPtr<WebTaskRunner> task_runner = TaskRunnerHelper::Get(

[Sami, 2017/04/27 17:38:17]

Interesting, can TaskRunnerHelper be changed to take a const instead?

[Dan Elphick, 2017/05/03 09:41:06]

not required now we're not using getting the scheduler via the frame

+        TaskType::kAnimationTimer, const_cast<Document*>(&document));
+    if (ImageResourceContent* cached_image = ImageResourceContent::Fetch(
+            task_runner, params, document.Fetcher())) {
       cached_image_ = StyleFetchedImageSet::Create(
           cached_image, image.scale_factor, this, params.Url());
     } else {