Properly set is_scroll_animator_enabled_ on RenderThreadImpl.

Before crrev.com/c/2485659, this was done in
RenderThreadImpl::CreateView, but this got lost when moving CreateView
to AgentSchedulingGroup.

Fixed: 1141547, 1141397
Change-Id: Iccf2ecab42b039640c53001544823e2b599ccbcf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2494191Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Takashi Sakamoto <tasak@google.com>
Commit-Queue: Tal Pressman <talp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820168}

content/renderer/agent_scheduling_group.cc

@@ -132,6 +132,8 @@ mojom::RouteProvider* AgentSchedulingGroup::GetRemoteRouteProvider() {
 
 void AgentSchedulingGroup::CreateView(mojom::CreateViewParamsPtr params) {
   RenderThreadImpl& renderer = ToImpl(render_thread_);
+  renderer.SetScrollAnimatorEnabled(
+      params->web_preferences.enable_scroll_animator, PassKey());
 
   RenderViewImpl::Create(
       *this, &renderer, std::move(params), RenderWidget::ShowCallback(),

content/renderer/render_thread_impl.cc

@@ -1349,6 +1349,12 @@ bool RenderThreadImpl::IsScrollAnimatorEnabled() {
   return is_scroll_animator_enabled_;
 }
 
+void RenderThreadImpl::SetScrollAnimatorEnabled(
+    bool enable_scroll_animator,
+    util::PassKey<AgentSchedulingGroup>) {
+  is_scroll_animator_enabled_ = enable_scroll_animator;
+}
+
 std::unique_ptr<cc::UkmRecorderFactory>
 RenderThreadImpl::CreateUkmRecorderFactory() {
   return std::make_unique<UkmRecorderFactoryImpl>(child_process_host());

content/renderer/render_thread_impl.h

@@ -200,6 +200,13 @@ class CONTENT_EXPORT RenderThreadImpl
   bool IsScrollAnimatorEnabled() override;
   std::unique_ptr<cc::UkmRecorderFactory> CreateUkmRecorderFactory() override;
 
+  // TODO(crbug.com/1111231): The `enable_scroll_animator` flag is currently
+  // being passed as part of `CreateViewParams`, despite it looking like a
+  // global setting. It should probably be moved to some `mojom::Renderer` API
+  // and this method should be removed.
+  void SetScrollAnimatorEnabled(bool enable_scroll_animator,
+                                util::PassKey<AgentSchedulingGroup>);
+
   bool IsThreadedAnimationEnabled();
   scoped_refptr<base::SingleThreadTaskRunner>
   GetCompositorMainThreadTaskRunner();