cc: Add image decode queue functionality to image manager.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index 584eb9b95e73114a6bd8ca300342bff1cf3324e5..e834a066788754dd74e89017aa81066ecfb966cc 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -18,6 +18,9 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/sys_info.h"
+#include "base/task_scheduler/post_task.h"
+#include "base/task_scheduler/task_scheduler.h"
+#include "base/task_scheduler/task_traits.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "base/values.h"
@@ -265,6 +268,14 @@ void RenderWidgetCompositor::Initialize(float device_scale_factor) {
     params.main_task_runner =
         compositor_deps_->GetCompositorMainThreadTaskRunner();
     params.mutator_host = animation_host_.get();
+    if (base::TaskScheduler::GetInstance()) {
+      params.image_worker_task_runner =
+          base::CreateSequencedTaskRunnerWithTraits(
+              base::TaskTraits()
+                  .WithPriority(base::TaskPriority::BACKGROUND)
+                  .WithShutdownBehavior(
+                      base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN));
+    }
     if (!threaded_) {
       // Single-threaded layout tests.
       layer_tree_host_ =